If clubs are paying more in wages than income, they need to pay players less. There's no rule that says clubs have to overspend - the opposite actually - but so many do so in pursuit of climbing the pyramid. Do you think that would be any different if the Premier League gave them a bigger slice of the pie? I don't.
If every league 2 club was given an extra £2m a year and every league 1 club was given an extra £5m a year and every Championship club was given an extra £20m a year, all that would happen is each club would offer higher wages to attract the same players in an attempt to climb the ladder and receive the even higher income. And when those teams get so far then drop back down, bankruptcies would follow.
Alternatively, you could say all Premier League and Football League clubs equally share the TV riches and get, say, £40m each. The top clubs would stay at the top as a result of superior stadium revenue, sponsorship and merchandising sales. And those clubs with an average crowd of 5,000 will remain in the bottom two divisions, but would farcically be paying Joe Journeyman £30k a week that he simply doesn't deserve.
I'm not saying the current set up is perfect by any means, but IT IS POSSIBLE for teams to climb from the lower leagues to the PL. After all, Brentford, Brighton, Wolves, Forest and Sheff Utd are current Premier League sides to play in League 1 within the previous 15 years, whilst Bournemouth were in League 2 in 2009/10 and Luton outside of the Football League altogether only 10 years ago. The current top 4 in the Championship have also spent time in League 1 within the last 15 years, as well as in the PL (even winning it once!).
All the evidence shows that a well run club can, with a bit of luck, rise to the PL and stay there for a number of seasons. But it's not easy to stay there forever, nor has it ever been. Granted the super clubs will always dominate at the top, but that would be the case even with equal broadcasting income as Man Utd, for example, will always generate vastly more matchday income and merchandising revenue than Luton or Bournemouth, even if they drop into mid table for a period.
Personally I think it is great that non-league football is thriving and long may that continue. But the best supported clubs, and/or those with a wealthy sugar daddy, will always dominate at the top. Certainly that's been the case throughout my lifetime (I'm 50).