Man alive, that's why jumping from Nat South to National is difficult, look at the x 2 1/2 budgets ! Also, why is North higher than South, intuitively you might expect the reverse ?
Bigger clubs in NLN.
Maybe clubs stuck in NLN which used to be bigger, and are still paying out higher wages in a vain attempt to get back up to NL. Goodness me, for each failed promotion year it must get squeakier and squeakier for them !