I don't know why, single parents get free child care, free education, free housing, free healthcare, and the list goes on ands on. I think they don't work because they would lose all the "free" stuff and make it harder for them to get by. Well who's fault is that, mine? 
What I would like to see is once a single parent finds a job the welfare benefits (whatever they are) she keeps for a period of time so she/he can build something in the bank to give them a better foundation to move forward. As it sits now once you make X the government throws them off and they always fail and are back on the boob within a short period of time.