This is far fetched ---- or is it?
The produce/reward system is very common in our society. I can remember the gold stars on my report cards when I was a kid for A's. Allowances are another "reward" that is very common. The kid usually has to do something to earn the allowance. That is work/reward. I used to "reward" my son for his baseball accomplishments (indirectly). His work ethic earned him a CD player in his truck. He wanted to work at Kroger so he could buy the CD player and I said if he would work at baseball I would buy the CD player for him. His baseball production also garnered him many rewards even a college scholarship which in part was paid to him in cash. It may be wrong to write a contract promising money for a home run but many parents "reward" their kids with expensive baseball "things" hoping for increased production.
Fungo