The logic behind that is that drink and laziness create the demand for those policies, not the lack of jobs. There's always going to be some amount of joblessness, but that has has to be denied, because it doesn't fit the belief system.
It's also useful to make receiving help as uncomfortable as possible, to create downward pressure on wages. Wouldn't wanna be one of those leeches now, would you? Better stay at that shit job. A bird in your hand is better than two in the bush.
And so what if it hits those that legitimately need help. They are a minority so they have no political power, no need to cater to them. They didn't have enough magical willpower to make it anyway, so fuck 'em.