The big money companies are in a position to buy up credits from smaller company’s that will not need all of theirs. Thus giving the major producers of carbon emissions additional credits to keep on doing what they’re doing. That plus it gives them another tax write-off as a business expense.
All the countries involved in this also see the increase in tax $$$$ to their coffers.
Big business and government don’t do anything unless it is going to put our money in their pockets. I’ve watched their games for over six decades.