Suppose you decide to feed stray cats. You put out enough food for however many cats show up. After a month or two, you'll be feeding 20+ stray cats every day, and you'll be wondering "Where did all these cats come from?"

It's the same with welfare. If you give free money and food to unproductive people with no job, they have children, and now you have even more unproductive people with no job. Due to the way welfare works, the more children you have, the more you get paid. If you're a deadbeat parent, the increase in welfare benefit is more than the actual cost of a child. Thus, if your "career" is welfare recipient, the only way you can get a raise is by having more children.

If your "career" is welfare recipient, you have no reason to learn how to be polite to other people. A normal person with a job has to learn how to be polite, because he's forced to deal with idiots all day at work without getting fired. A welfare recipient has no need to learn how to play nice with others.