Haven't read it but I remember reading about a study where they would watch some kids play with toys, record which were their favorite ones and then in another play session give them sweets for playing with their favorite toys after which those toys would no longer be their favorite.

However even though most people don't enjoy their work we must learn to get past that in order to achieve our goals, might as well learn this early imo.

Personally I hated most of school, pretty much every subject that wasn't math or programming. Rewards did motivate me to learn those things I didn't like.

So maybe only reward them for doing stuff they already don't like doing but would be good for them. If you see your kid doing well in math but poorly in history only reward them for history.

So... Paying people to write software inhibits them writing software?

Doesn't inhibit them but makes the activity not pleasant because your mind is attaching the work itself to external motivation. You don't do it because you want to (for the pleasure of it), but for a paycheck and humans don't enjoy activities like that if they're not starving.

This is how every other job in the world works, you work for money.

Honestly, I don't think there are very many people who wash dishes for pleasure. If you have a kid who loves cleaning for fun, by all means, don't pay them to do it.

Could you elaborate on how that might be?