Dave it really is an amazing business and process.
I pay my staff a % of the days turnover (this will not be revealed so dont ask) give them a list of work they cant possibly get through and equipment that will not restrict them ie large tanks that dont run out, light poles and now hot water. Other than that things are priced well and our rota is arranged in a way that means the least possible amount of driving each day, I use google earth to do this. Also because they cant get through the list, if they get turned away by a customer or 2 they still hit the same numbers.
Vans leave yard at or before 8am not alowed to return before 4pm unless tank is empty and thats the only reason thats alowed. They get back at 4-30pm, refill vans from static, connect battery chargers and heaters if its cold. Hand worksheets into me at which time we take 5 minutes to section the next bit out round for each van for the next day. and home we go.
Day in day out they earn the same. Its amazing how the turnover went up when I started paying that way.
Now your going to say that encourages them to be sloppy and cut corners. Oh no, I have lots of rules and proceses in place to prevent that and they work a treat.