Inequality has always been apart of football, I'd be confident if you went through the top 5 leagues in Europe you will find 75% of the teams have been in the top division for 80 of the last 100 years. Is it inequality that has Blackburn in the championship or is it just the natural order? Bolton, Wigan, Norwich, Burnley, teams like this are never meant to be mainstays in the top division, their population and support base simply doesn't have the means or support to compete against bigger clubs. Its normal for them to have good sides occasionally that get promoted and eventually relegated again. Just like its normal bad decision making will have big clubs like Sheffield Wednesday and yourselves previously in the lower leagues.
The issue is relegation has meant a threat to existence too many times, Burnley and Norwich are well managed but for everyone of those you have a Wigan, Bolton, Portsmouth or Sunderland. FFP hasn't worked and it needs replacing with regulation that protects clubs longterm. As I said it shouldn't be Liverpool deciding the futures of Plymouth or Exeter, it should be the FA because the clubs have proved consistently they can't look after themselves.