Who's running the country ? 🤣🤣
In theory, we have a free market, with restraints preventing monopolies plus regulations, social insurance and welfare to address the excesses and inequities.
So the decadent culture is at least partly a matter of the free market's invisible hand at work.
OTOH, I think we are trending more toward monopolism. The rotten culture might be more a product of mass marketing than free competition.
As far as culture, Madison Avenue and Hollywood are probably running things. And they target market an age group that does not include us. I never even heard of most of the contemporary country stars, let alone hip hop or metal.