Carbon offset futures I guess. Still, the moment that the government says "you need to pay big for your CO2" and the company decides "OK, let's buy some carbon

Carbon offset futures I guess. Still, the moment that the government says "you need to pay big for your CO2" and the company decides "OK, let's buy some carbon offset futures offshore", that distills down to "let's send a billion dollars offshore for no tangible product", in which case from a capitalist POV they've basically donated the money. What would motivate the government not to just take it as tax money instead and use it to build more energy in their own country.