> People don't want to live at the subsistence level, and we're not evenly remotely close to having enough resources to satisfy everybody's wants.
What people want is defined by society. Somehow some people want to be alone in a 2 tons EV, a 200 sqm mansion for a family of 4 and retire at 40. Others are tremendously happy with a much, much less resources intensive lifestyles.
You would also need to define what is part of the subsistence level. I'd put it roughly at what my grandma wanted: food, shelter, healthcare, some leisure time.
A bit more than that is absolutely doable in a civilisation that went from one farmer to feed 1.3 people to one farmer to feed 60 people.