Someone is going to abuse any good service ever created. You can't let emotionally irritating anecdotes of welfare queens blind you to the huge problem in our country that poverty represents, and the moral and policy necessity of working to improve things. It's like the mandate to drug test welfare recipients in Florida, which only ended up costing taxpayers MORE money because of the low number of positives and high cost of testing - it's cutting off the nose to spite the face. Yes, people abuse welfare, though not nearly so much as conservatives seem to imagine - crusades against waste have been going on for decades now. That doesn't mean we need to cut back on welfare, unless it's clear that the new policies you're proposing will do more to help the economy and welfare of the citizens of America than the harm it creates.
Poverty used to be one of our bipartisan, national priorities, back before evangelicals completely abandoned Christianity in their politics. One of Reagan's most proud accomplishments was reducing the tax burden on the poor, Johnson made huge strides in the Great Society, even Bush II talked about 'compassionate conservatism.' Now privileged libertarians just piss down on the poor with talk of bootstraps and the mythical welfare queen.
Besides that, it's an economic necessity. Give money to the poor and it's going to buy food, rent, let's be stereotypical and even say cigarettes and booze. All of those are local purchases which ripple through our economy. Give another tax break to millionaires and it's going to investments in China and bank accounts in Switzerland. That's why food stamps are such a hugely productive stimulus tool, in addition to being the right thing to do morally.
As with all things, this can obviously go too far. Too much water will kill you as surely as no water. That doesn't discredit drinking water as a generally healthy activity.