After the disaster of 20th century economics everyone has a voice in his head that tells him that markets more or less function without anyone directing them A free market in goods doesn't devolve into everyone trying to sell luxury goods to the 1% A free mating market does
Why not? Well, because women never really have to be bothered with worrying about whether or not society disintegrates - they'll get sold off by the post-apocalypse winners and be pretty happy about it