I think OP meant that the value of the allowance isn't directly correlated with the chores or quality thereof, so doing the dishes isn't $X, and doing them well isn't $Y (netting them more). The child gets $Z amount per month, and that number can only go down based on lack of completion or quality, and isn't broken down to a certain amount per chore.

I could be wrong, but that is what I got from it.