People getting paid to do things do worse than otherwise[1]. They do better when not paid. The quality of work often gets worse when they get more. It's well established. As counterintuitive as sometimes it seem to be.
What I'm essentially saying is, if you think people are right now getting paid to do something bad to the society(e.g. ads), you might want to keep them hooked and tied to the money and not to something else, like advertising for its own sake.
Fear the work of unpaid ad execs! They won't stop making adverts, it's what they live for, money or no money! The adverts will continue to be made, but now they will be made for love, and they will be extremely high quality! And if you think ordinary adverts are bad, wait until you see what adverts are like when they come from the heart!