So we got compliments when we were out running errands with the kids. In fact, we still do.
One morning, the kids were being cranky from being up late the night before. I really needed to go grocery shopping that day and wanted the kids to behave. So I told them for every compliment they got, I would give them a quarter each. Mind you, this was several years ago when a quarter was cool because they could put it into a candy machine (remember those??).
This totally worked!!
I didn't do this their whole childhood, but long enough to get the results I wanted. I eventually began the process of phasing this type of childhood income out.
I am not opposed to paying them for good behavior. We pay them for good grades, mowing the lawn, and I believe good manners should also be rewarded.
I also "paid" them in jellybeans, M&M's, etc. when they were potty training.
Hey, I got the results I wanted!
Maybe it'll work for you, too.