Also, it's a fact that it's harder than ever to be a full-time musician these days - the money just isn't there.
So, if the person with the money wants YOU specifically to do whatever it is you do, then you're in a good position to get paid for it.
However, if the person with the money just wants any old Tom, Dick or Harry there to do whatever it is they do, the cheapest / free person will generally win.
Sad, but true.