The working poor are working people whose incomes fall below a given poverty line due to lack of work hours and/or low wages.Largely because they are earning such low wages, the working poor face numerous obstacles that make it difficult for many of them to find and keep a job, save up money, and maintain a sense of self-worth. The working poor are working people whose incomes fall below a given poverty line due to lack of work hours and/or low wages.Largely because they are earning such low wages, the working poor face numerous obstacles that make it difficult for many of them to find and keep a job, save up money, and maintain a sense of self-worth. The official working poverty rate in the US has remained relatively static over the past four decades, but many social scientists argue that the official rate is set too low, and that the proportion of workers facing significant financial hardship has instead increased over the years. Changes in the economy, especially the shift from a manufacturing-based to a service-based economy, have resulted in the polarization of the labor market. This means that there are more jobs at the top and the bottom of the income spectrum, but fewer jobs in the middle. There are a wide range of anti-poverty policies that have been shown to improve the situation of the working poor. Research suggests that increasing welfare state generosity is the most effective way to reduce poverty and working poverty. In the United States, the issue of working poverty was initially brought to the public's attention during the Progressive Era (1890s–1920s). Progressive Era thinkers like Robert Hunter, Jane Addams, and W.E.B. Du Bois saw society's unequal opportunity structure as the root cause of poverty and working poverty, but they also saw a link between moral factors and poverty. In his study of Philadelphia's African American neighborhoods, W.E.B. Du Bois draws a distinction between 'hardworking' poor people who fail to escape poverty due to racial discrimination and those who are poor due to moral deficiencies such as laziness or lack of perseverance. After the Great Depression, the New Deal, and World War II, the United States experienced an era of prosperity during which most workers experienced significant gains in wages and working conditions. During this period (1930s–1950s), scholars shifted their attention away from poverty and working poverty. However, in the late 1950s and early 1960s American scholars and policymakers began to revisit the problem. Influential books like John Kenneth Galbraith's The Affluent Society (1958) and Michael Harrington's The Other America (1962) reinvigorated the discussions on poverty and working poverty in the United States. Since the start of the War on Poverty in the 1960s, scholars and policymakers on both ends of the political spectrum have paid an increasing amount of attention to working poverty. One of the key ongoing debates concerns the distinction between the working and the nonworking (unemployed) poor. Conservative scholars tend to see nonworking poverty as a more urgent problem than working poverty because they believe that non-work is a moral hazard that leads to welfare dependency and laziness, whereas work, even poorly paid work, is morally beneficial. In order to solve the problem of nonworking poverty, some conservative scholars argue that the government must stop 'coddling' the poor with welfare benefits like AFDC/TANF. On the other hand, liberal scholars and policymakers often argue that most working and nonworking poor people are quite similar. Studies comparing single mothers on and off welfare show that receiving welfare payments does not degrade a person's desire to find a job and get off of welfare. The main difference between the working and the nonworking poor, they argue, is that the nonworking poor have a more difficult time overcoming basic barriers to entry into the labor market, such as arranging for affordable childcare, finding housing near potential jobs, or arranging for transportation to and from work. In order to help the nonworking poor gain entry into the labor market, liberal scholars and policymakers argue that the government should provide more housing assistance, childcare, and other kinds of aid to poor families. Discussions about the alleviation of working poverty are also politically charged. Conservative scholars and policymakers often attribute the prevalence of inequality and working poverty to overregulation and overtaxation, which they claim constricts job growth. In order to lower the rate of working poverty, conservatives advocate reducing welfare benefits and enacting less stringent labor laws. On the other hand, many liberals argue that working poverty can only be solved through increased, not decreased, government intervention. This government intervention could include workplace reforms (such as higher minimum wages, living wage laws, job training programs, etc.) and an increase in government transfers (such as housing, food, childcare, and healthcare subsidies). According to the US Department of Labor, the working poor 'are persons who spent at least 27 weeks in the labor force (that is, working or looking for work), but whose incomes fell below the official poverty level.' In other words, if someone spent more than half of the past year in the labor force without earning more than the official poverty threshold, the US Department of Labor would classify them as 'working poor.' (Note: The official poverty threshold, which is set by the US Census Bureau, varies depending on the size of a family and the age of the family members.) The US Bureau of Labor Statistics calculates working poverty rates for all working individuals, all families with at least one worker, and all 'unrelated individuals.' The individual-level working poverty rate calculates the percentage of all workers whose incomes fall below the poverty threshold. In 2009, the individual-level working poverty rate in the US was 7%, compared to 4.7% in 2000. The family-level working poverty rate only includes families of two or more people who are related by birth, marriage, or adoption. According to the Bureau of Labor Statistics' definition of family-level working poverty, a family is working poor if the combined cash income of the family falls below the poverty threshold for a family of their size. In 2009, the family-level working poverty rate in the US was 7.9%, compared to 5.6% in 2000. Finally, the unrelated individual working poverty rate measures working poverty among those who do not currently live with any family members. In 2009, 11.7% of employed unrelated individuals were poor, compared to 7.6% in 2000.