Well the market is the arbiter of this and there are so many hobby pilots around the wages are depressed. They are not in it for the money to begin with. Here's an analysis showing the wages could be just about anything if the market approved.
Revenue
4 tandem jumps/hr @$250ea
-------------
1,000.00/hr
Cost
pilot 20.00/hr
aircraft @125.00/hr wet
hangar rent 10.00/hr
website 5.00/hr
packers 75.00/hr
misc. 25.00/hr
----------------
260.00/hr
Net
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740.00 /hr