I never tried paying by piece work...... maybe I should have. I can see the advantages and disadvantages. Now I guess it works if its a 2 way street but I can see where it is a mess if the employee or boss is trying to screw each other.
I guess the way things are anymore it would probably end up being a negative in a lot of cases...... just like the post lately about a boss not paying over 10 minutes travel. If he was screwing the employee there , Im sure he would be screwing you on an install paying by piece work.