This question is related to a preceding question about procurement.

In commercial property management, if the properly manager is paid a percentage for managing a procurement contract for commercial rental properties, the properly manager benefits if the contract amount is higher, because a larger contract results in a higher percentage-based fee. What contractual incentives can be included in the property management contract to induce the property manager to strike the best contractual price? If the contract dispenses with a percentage-based contract administration fee, using a flat fee for example, different risks arise. The property manager might not investigate best prices or supervise the contract as required. In other words, the property manager can increase its profits by reducing its time investment instead of increasing its revenues. Does game theory have any suggestions?

These questions seem to fall into a more general category of using game theory to influence fiduciaries to honor their fiduciary obligations.