How many other occupations pay clerical and paraprofessional support based on gross revenue?  I can't think of many.  Just because it's a business model pioneered by two guys from Kansas City, doesn't mean it's a good idea. 

For many years I paid my tax-season employees an hourly rate, and then an April 15 bonus if they were still around.  That's when the bank balance was highest, unlike Christmas when it was depleted except for seed money needed for next season.