Not a winner or loser. It's just that, if I get you to lower your price by 10%, then it's more money staying in my pocket and less money going to your pocket. A

Not a winner or loser. It's just that, if I get you to lower your price by 10%, then it's more money staying in my pocket and less money going to your pocket. And similarly, if you convince me that your shoddy work is good enough, then you have more time left to do other work, instead of spending it on me. Both scenarios demonstrate the zero-sum aspect of paid work.