Stupid people breeding more stupid people at the expense of those who work for a living can not last forever-at some point in the very near future,the stupid people will outnumber those who work for a living,and the whole welfare state will collapse.
Large numbers of stupid people will then riot,destroying their own neighborhoods,leaving lots of cities smoldering ruins-then maybe we will be back to where stupid people,who do stupid things will be removed from the gene pool.