Productivity has skyrocketed, we crossed ~ 20% of current GDP per capita around middle of the last century and we would be able to get by quite well with that. There would need to be many policy and cultural changes to do it but it's definitely collecitively a choice today more than anything else.
How we distribute the surplus of production is decided democratically even with the current main knobs (taxes, income transfers, regulation, etc). And of we're not limited to existing tunables. Exercising this choice would need to start by citizens becoming active with this of course.
