Capitalism IS the defacto system in use by all first world countries. Even China is gripped in it's fist.

Until we can get to a resource-based economy, we'll have to work within capitalism to solve the problems presented when a UBI is introduced. Consumption is a tenet of capitalism and that'll still need to happen.

UBI won't stop people from working. We'd all need to find something we CAN do that someone will pay us money for. I feel pretty good about my role, but I'm almost ready for retirement, so I'm not as worried as I would have been in my 30's....