Terms you may want to use in a search: lower class, working class, underclass, poor

and/or

any of the following terms: blue collar worker, employment,  unemployment,  employment levels,  under employment,   downward mobility,  upward mobility, income distrubution, income, income inequities, labor market, lifestyles, low income, occupational structure, recession, social mobility,  socioeconomic status,  economic status, standard of living,  taxes,  wealth, upward mobility,  salaries,  living wage, minimum wage,  wages.​