You are the manager of a logistic company. The profit of your company depends on the number of parcels delivered in an hour. You cannot directly monitor the drivers who help transport parcels, however, you are now considering two possible payment schemes to the drivers.

Scheme A: a fixed hourly wage

Scheme B: a fixed payment on parcels transported in an hour

(1) Suggest a possible scheme that is better than Scheme A&B, briefly explain your suggestion.