There are many who work hard and cannot pay normal bills.
Once I hired laborers to work on my residential project, the heat index was 115 F and the work was back breaking.. They worked till they fell flat. The agency who provided me these laborer charged me US$20.00/hr, but gave them only minimum wage. They probably took home about US$5.00 to $US 6.00/hr. They have no health coverage. They cannot afford an apartment, medical bills, or private transportation. The meals they got from me was charity. Sometimes even when they are ready to work there is no work available.
If you have not been poor before, you cannot understand what it mean surviving on minimum wage. It is not workable however hard you work. The maths will show you cannot support yourself and it is worse if you have dependents.
These people who have less or no opportunities like the rich, need to survive. The government becomes a lifeline. What is more, money given to them has to be spent to survive. The rich however, have enough and any additional money they get from say tax-breaks or windfalls is not likely to be spent. Therefore money to the poor will more likely stimulate the economy. Gains by the rich will have minimum impact on the economy. Read my hub on Government Spending and Taxes during recession.
Therefore government entitlements provide benefit to the economy and provide relief to those you don't yet have opportunities to rise. It makes spiritual and monetary sense.