I cant see alot wrong with what Wagga is doing. As far a I know he has fasioned his own WFP which if hes happy with and works fine then there is no problem.
And Lee your right - the important bit is the customer handing over the paper sheets with a smile on their face. (actually, scrap the smile, just the money is what were all after lol)
Fair play to the bloke aswell, I know his videos has helped hunderds of window cleaners