If you ever happen to find a freelancer who delivers good work, overpaying is the absolute best way of making sure you'll get your work done better than the rest and on time and you may get your work cheaper in the long run. I have several freelancers charge me less than everyone else even though they're worth more, just because of this.
I guarantee you that those new freelancers are going to always remember you as that one decent person who didn't fuck them over when they were new in the game like all the other fucktards who probably bitch about a $2 article and demand it rewritten.
Of course, this only applies to the rare talented freelancer who takes pride in their work.