Carbon tax is good, but if it succeed it will gradually lower funds for UBI until full success make zero UBI.

Gates suggestion is looking further into the future, where carbon problems may be eliminated, but automation is going even stronger. There may be other solutions, but a carbon tax is in lack of better words, doomed to succeed.

I would like to add, that it is the corporations, the ones looking for profits, that ironically is the main drivers of useless jobs, like administration, PR, layers ++. But you don't need much insight to see that capitalism actually isn't economic at all. Useless jobs, planed obsoletions, global chase of cheap manpower ++ are all the opposite of economical