That link makes the unfounded assumption that the poor choose to be poor. If you assume that the poor choose to be poor, then it is easy to see that there are situations in which it's rational to choose to try to live off welfare. From that perspective it makes perfect sense to want to make the lives of poor people even more miserable so they'll choose to stop being so poor...

Also, don't forget that Clinton ended welfare as we know it, resulting in fixed periods of welfare anyway. It also resulted in some evils, like single mothers working 6 hours a day (with their kids in a daycare) making less money and spending less time raising their children.

I think the final line (heavily edited) "it is rational not to work as long as work opportunities pay less than $30k/year" is what we should focus on: let's try to make their work opportunities better through extra services (maybe mandatory without a waiver of disability or insanity) that give training and education.