They would probably be OK with it in the abstract (“we like it but it isn’t happening”) if the US left didn’t exist. Since the US left exists, they have to openly oppose it.

The disdain they have for the poor is enough, thats all it is. They hate poor people

M4A is both too simple and too drastic of an idea. They’d rather have some overly complicated technocratic knob turning.

American neolibs are different than other countries’ technocrats. The UK and EU knows to give concessions to their people for the sake of a strong consumer base, but the American elite are so resentful of the poor that they view giving even the slightest concessions as a total failure if there isn’t an equal or greater handout to elites (see: Obamacare).

Cuz their kweens (who have stocks in insurance companies) tell them is evil, and they see how much poor people want it so it’s even worse in their eyes.

Long rooted anti communist sentiment has made it so that the American ruling party would most likely refuse social services to poor people even when it’s directly against their own self interest. They’d rather see capitalism collapse rather than make concessions to the poor to uphold capitalism out of pure spite