I don’t know - a carbon tax and telling everyone they’re required to come to the office just seems like it’s punishing workers even more. For many people transit it’s not available or odd fossil fueled powered. WFH should be preferred over a carbon tax on commuting - eliminating the consumption altogether is far better than sending tax money to the government and hoping that people change behaviors based on pricing.

A 900% tax would make workers tell their employers that they demand to work from home, get a big pay rise, or go on strike...

It's not just political suicide, it's a game theoretical non-optimal play because any one country doing this only hurts themselves while not actually solving climate change. It only works if you have some large number of the top emitters agree to cap all together.

900% of 0 = 0.

By put a 0, OP means add a zero (3.95 -> 39.5). Not make gas free.