Carbon offsets working is when they make it so that producing carbon is expensive enough to change how companies behave. Of course, that could be done better with a number of other schemes like a carbon tax (with or without rebate)
That could be done better without the private companies at all.
Like what zero carbon economic system? Or is this yet another case where communism just is assumed to magically work?
When we no longer have an irrational need to increase profits, it becomes much easier to change production lines to emit less and less carbon.
China, by the way, is the leader in clean energy, despite being the country with the most emissions, which is simply explained by the fact that it was until recently also the country with the largest population in the world.