The NL average attendance for 19/20 was just shy of 2200, equivalent figures for NLN (1075ish) and NLS (around 850) are less than half that. When you couple this with the higher average entry price at NL level (£18 for an adult is the norm, many clubs charge more) then it's entirely plausible that NL clubs could be bringing in almost three times the average gate receipts of clubs at NLN/NLS level. If you multiply average attendances by admission prices for each club and the money was totalled up per division (yes, I know that's a lot of work!), I think you'd see NL clubs bringing in gate receipts around 2.75-3x NLN and 3-3.25x NLS. On average.
The problem as I see it is that the largest clubs in each division have been given far too little and the smallest clubs have been given far too much. Most of the clubs in the middle (Woking included) have come out roughly where they should be. So why not simply take away from Hungerford, Concord, Braintree, etc. and give more to yourselves and Maidstone? You don't need to take away from NL clubs, the money just needs to be distributed more realistically within each division. There's plenty of scope to do that, if the will is there from the league administrators.
Oh, and based on their performance last night, Dover are heading directly for NLS without passing Go (although still getting their £200, annoyingly). So there's a good chance you can give Parmenter a piece of your mind next season, assuming fans are allowed into games again.