First of all Celtic is NOT bigger than Liverpool and neither is Rangers so lets set the record straight on that one, Plus even if Celtic and Rangers came into the EPL they wouldn't even get in Europe as far as Im concerned, there are better teams like Chelsea, Man Utd, Arsenal, Liverpool, Man City, Spurs & Aston Villa. They would probably be a mid-table team.
Plus the likes of Celtic, Dortmund etc will have a better chance (not in a million years) you look at the last outsider to win the UEFA Champions League it was Porto back in 2004 that won't happen for a very long time if not ever again.
So I really can't understand what you mean when you say well run clubs, its all about money and if your chairman doesn't put money into the club then you have no chance of silverware really, thats the way football has gone.