The first two options are only viable in a couple of sectors and increasingly (in my opinion) we've seen on the job training for low-experience workers vanish in the software sector. Not everyone is going to want to go the trade school route and again, limiting educational options by wealth is why we're in this situation in the first place.

And the military is a no-go. We already use it as a welfare gate for poor Americans, creating a society where the poor have to serve in the military to survive while the rich skip out. This is a dystopian ideal to me.