IMHO, an employee works for an hourly wage package [W2]....whereas an independent contractor[1099] could do "piece work".
Some guys may hack stuff to get it done quicker. So if Joe Employee wraps a window, and f's it up, can I make him do it again until it's right before I pay him for it?
Or suppose he wraps a window, then drops the ladder or something, and dents the sill. Can I make him repair that before he is compensated?