Personal trust in both directions between the dealer and his managers is essential. That is a professional relationship. There must be an atmosphere of mutual personal and professional respect. Trust, however, can only exist in a system of checks and balances which are well defined, known, understood and implemented. Limits, also, relate to time - time in a particular position or slot.
Limits also relate to oversight.
Suppliers and vendors must be advised of dealership policies against gratuities and cautioned that they will be held responsible if a gratuity is given. If used vehicles are not taken to auction, then the dealer must personally take charge, ascertain who is buying used vehicles and not allow any one or more buyers to monopolize the process. If possible, two people who do not ordinarily work together should handle the function and they should be rotated. Better still, the dealer should do his own wholesaling. The dealer himself must determine the suppliers and vendors to the dealership.