Depending on your country, there are usually ways of implementing laws that cannot be overturned with a simple majority. Things like ballot initiatives and cons

Depending on your country, there are usually ways of implementing laws that cannot be overturned with a simple majority. Things like ballot initiatives and constitutional amendments come to mind. Obviously carbon tax bills would be tricky to enact this way since they are fairly technical, but you could set up an agency with it's own authority, ability to appoint it's own executive, etc, if there was a real mandate to have an agency that was beyond political control.