Eventually, there won't be enough people giving back into the system and the whole thing will collapse. Before this happens, taxes will continue to be raised in people in lower income brackets.
The politicians love it though. It creates an instant voter base. Why would a person, receiving free money, vote for someone that will take it away?
Because of things like this, I wish we had laws in place that all voters had to at least 1) work some sort of job (it doesn't matter what it is) and 2) proof they paid income taxes.