Child care, elder care. Cleaning the house, cooking the meals, getting the groceries, checking the homework, packing the lunches, scheduling the playdates, planning the parties, booking the doctor’s appointments, getting everyone where they need to be, paying the bills, making the calls, preparing activities.
As for taxes, we’ve chosen to allow income inequality to reach ridiculous levels. There are other choices.
This is a strawman. Nobody is claiming that we'll close all restaurants. People who want extra money (or just want something to do) will work in service jobs, and if the supply of workers is too low then that will heavily incentivise automation and investing in productivity improvents.
As well as, possibly (and hopefully), rising pay in hitherto underpaid jobs.
What is all this ‘meaningful work’ and who’s paying the taxes to support it?