It’s probably too late for a tax-only solution. Either the tax is too low to have the necessary effect, or people will overthrow the government who instated it. The change we need has become quite drastic.

Of course sudden imposing of sufficiently high tax will cause massive shockwaves going through markets and people's lifes.

Therefore tax should be increased gradually, year by year, spread out for ~10 years.

That would have been a great strategy about thirty years ago. Now we can’t really afford a measure that only really starts working a couple of years in the future. We already know pretty well what needs to be done, we don’t need the market to figure it out for us.

The best moment to starting it was 30 years ago. The next best moment is now.

Don't cry over spilled milk. It is spilled. But don't throw the rest just because the glass is now half empty.

As otherwise, in 30 years, we'll be in the same exact spot.

Best is the enemy of good.

That's a false dichotomy as there are a ton of measures other than a tax that we can take (even in parallel to a tax).

Imagine the money collected being awarded on a per tonne basis for each tonne of carbon you can extract and reliably sequester.

Yes, this is a one of the steps of the way how it should work from my point of view.

What is your point?