I used to work at top graded Mackers (Mcdonald's reviews their stores and grades them) with a really awesome store manager and some great (took their jobs and quality very seriously) managers. The experience was great and really enjoyable. Unfortunately, the pay was just above minimum wage and the long term prospects were terrible.
I can totally see how these guys/gals would be loyal and sticky if taken care of. Hard work you can leave at the door is very satisfying if you don't feel like you're going nowhere...
Incidentally the 3x average sounds almost spot on; I believe our store manager was making about 70k and he was highly valued as a store "fixer" by the chain owner in the Dallas area.