Well yeah, the solution to the problem is the same on national & European level, spread the wealth & do it in a fair distribution so the smaller sides get bolstered every season to gradually, if not level the playing field, make it possible for the smaller clubs to cause upsets more often & benefit from some portion of the other clubs financial successes.
I am not sure if this is a viable example, as Norwegian football never was stinking rich as i.e. PL and La Liga. So the total turnover is small.
However throughout the nintees Rosenborg started to qualify for CL every year. And as a sole Scandinavian team in CL they also took the Whole media pot for Scandinavia. This lead to them being a superpower a la Barca or Bayern, to a lesser scale of course. They had unlimited funds compared to the rest. They sold shit players (players who worked well in their system and hence looked good but flopped outside the system) for huge Money, and could raid other teams for their best players and so they Distributed quite a bit of cash in Norway as well. Kvarme and the former Nottingham Captain Hjelde being two examples.
With this wealth they of course kept on winning the League in Norway year by year, and also improved in Europe to the extent that Real Madrid, Juve, Dortmund and Milan among others travelled to Norway and expected to get beat (and also got beat).
But what happened around them was that other Norwegian sides started to improve. Several teams improved so much that they started to qualify for Europe themselves. Brann met Liverpool after beating PSV Eindhoven along the way and gradually the stadiums started to fill up, teams earned Money and Television started to pay big money to broadcast the Norwegian League. There were more and more games on, evening summaries, New and improved stadiums and rich investors.
The Clubs however didn't cope with the increased Income. They threw away the money on silly wages, stadiums they couldn't afford and other idiotic Investments casting no return. After some years it was just too much footie on the telly, and people got fed so much football wherever they turned around that they got tired I Guess. The games wasn't sepctacular enough maybe. I don't know. A football Club like Rosenborg had a 70 people administration with people working within sales, media, merchandise, sponsoring etc etc. It was not sutainable when the interest dropped. Rosenborg golden generation faded away and the New team was not good enough. Others tried to win that throne but htey were neither good enough and needed investors to pay their deficits year by year. Clubs were thrown out of their stadiums, or they had to sell it to the city council so they could get rid of debt.
I forgot where I am going with all this shit, but I think I meant to say that not spreading the wealth (I am all for spreading the TV money etc) equally might be to the best of the League, as the top teams will raise the bar for the other teams. The weaker teams will have to stretch themselves, keep on being innovative, be smarter, to win, and there is always a hope and dream that you can do it. And by having something to stretch for you will be better yourself. I mean, I do believe that the other Norwegian teams were better than ever in the period Rosenborg was at their best, however they never won the League as Rosenborg were just too good. So if you ask a fan of another team today if he wants Rosenborg to be that good again they will say "Hell No" even if the cosnequence were that their own team were better than ever. And another interesting find is that wealth and money is not neccesarily used well by clubs.