So without AI, the path forward is obvious: those 3 will become worse. Lowering retirement age, raising minimum wage, and expanding medicare won't happen without AI. They can't.
We already are reasonably close to a job guarantee. If unemployed people would accept any job, unemployment would drop by a lot. Not to zero, obviously, but a lot. Unemployment is also pretty low by historical standards, so fixing unemployment with a job guarantee can't fix much. We'll need something else.
> It's worth remembering that if AI really can do everyone's jobs then it'll be hyperdeflationary so no need to worry about pesky government spending on this stuff.
So yeah, I disagree. If you're going to assume AI will just jump to how capable it'll be 100 years from now, then you need to think a bit deeper. What AI effectively does, it provides capital-based labor. You buy a robot. Robot costs a lot, but operational expenses are marginal, energy and (maybe) "tokens". Add solar power, and let's say local AI becomes a thing, at least for normal robots, and you need nothing other than the initial cost of the robot.
Okay, so this will mean everything can be staffed with tens of thousands of these robots. Remote mine? No problem. 500 robots in your house? Why not. Cleaning very large facilities? Not a problem. Farm hundreds of square kilometers? Fine. Dig a canal to avoid the strait of Hormuz and just do it with shovels? Let's get to it. AI can be a universal machine that can do anything labor can achieve.
Obviously AI will massively increase the output of the economy, and people will figure out what to do with that, as people will want a shitload of things done. Which means the problem you're identifying will be trivial to solve, and we'll figure something out.