It is a trifle for the upper strata to promote sexual liberation; those who have money can shield themselves (to degree, and for a while) from at least some of the consequences of loose sexuality. The working classes do not have that luxury. In a country like this one, serial cohabitation and childbearing outside of marriage contribute more to poverty, dependency, and inequality than a million greedy capitalists do.
Do you to really want to raise up the poor? Then do as the English Methodists did in the eighteenth and nineteenth centuries: First live the Commandments. Then go among the people and preach them. Start with the ones about marriage and family.
I do not say this is all you should do, but if you won’t even do so much as this, then the rest of your social justice talk is hypocritical. You may as well admit that it is all about you.