Just my opinion, but one does not have to clear off one's plate. The solution is to eat what you want and then, either ask for a doggy bag or let them toss out the rest.

People have to be responsible for taking care of themselves. I've been part of the working poor - worked retail management, long hours that precluded cooking "healthy" meals, on a tight food budget, etc. However, I didn't eat a bunch of junk food.