I always figured that trading my work for someone else’s was a wash — each gains about what he gives. But a couple of friends, doing favors for each other, wherein neither makes any money, nevertheless incur monetary debts to the grabbyment by so doing? Really? There’s a proper payment for that.
Hey taxman! Yer payoff’s right here, down by where I’m feedin’ my hungry hogs. Come an’ get it! 
Cry, "Treason!"