[Nullifidian]

Negative images stick more than positive images. People who mooch are the ones that are seen while people who use the system how they're supposed to, no matter how much bigger this group is, are not heard of. It's like seeing an image of pretty girls and one ugly fat sow and all you'll remember is the sow, or when your horoscope (lol whoever reads that shit) says that you'll get bad luck and all you notice is bad luck despite all the good things happening to you (cognitive bias).
Don't be so quick to judge, and certainly don't make hard claims about this kind of stuff without proper evidence to back it up (for example: statistics on welfare abuse).