It is clear that if you reward people for irresponsible behaviour, that is what you will get, and having five children by four different men is the height of irresponsibility. To what extent the policies that have led our society to this place were intentionally aimed at undermining the family is a matter for debate. It is certainly the case that the Fabian intellectuals of the 'progressive era' saw families as the enemy. It was families that perpetuated all the human traits they held responsible for holding back progress to their promised land, and thus it was necessary to use education and social engineering to get hold of the next generation and inculcate the 'right' ideas. It is also true that this agenda has been helped along by legions of useful idiots and well-meaning philanthropists, unaware of the bigger picture.
The question is; what do we do about it? Taking it as essential to dramatically reduce the welfare state, we are left with the problem of all those hungry little bastards. It is no doubt true that their predicament is not their fault. Neither is it the fault of the average tax-payer, who has heretofore been expected to pick up the tab. At a higher level, without doubt it lies with the social engineers who purposefully and patiently undermined our society, but the fault lies immediately with the parents, primarily the mothers - the fathers also, whoever and wherever they are. The only way we can reduce this problem humanely - and I will not countenance enforced sterility, or other state-imposed limits on fertility, for this is surely worse than the present situation - is to hold people responsible for their actions, and kill the entitlement culture once and for all.
Within any such root-and-branch reform, there must be a separation of those that have paid in and those that have never done so. There may need to be a prolonged period of adjustment, so the welfare junkies can adapt to their new circumstances (welcome to the real world), but whatever happens, we cannot as a society afford to keep rewarding people for their irresponsibility, for one because it is immoral to take tax money from other people who are more responsible, and for two because our society will collapse without the family.