> Making up jobs to keep people employed isn't a viable solution to me. Supporting them in some way (re-training, UBI, service work, ...) seems like the only way forward

Everyone works 20 hours/week.

The 'problem' isn't what you think it is. The people in power are worried that lifting the boot off of the neck of the working class may result in loss of power for them.

They are right. Hence the stalemate.