It's always been a rich man's world.
Whoever has the most money (irrespective of the source of that money) has always bought the best players and as a result have always been at the top.
The premier League is far less boring these days than in the repetitive years of utd/Arsenal, utd/Chelsea, Liverpool/a n other. City aside, the Premier League is very exciting this season both at the top and bottom.
In the last five years there have been four different Premier League champions and Spurs have also emerged as a force.
Granted, City are head and shoulders above this season but that is down to one man. Yes, we might dominate whilst he is at City but at some point we will underperform and another team will take the lead. That's just the way it is.
La Liga has been predictable for many years, has too the Bundesliga and Serie A, so it is not a recent phenomenon.
Unfortunately FFP2 will probably ensure that salaries will become even more ridiculous with the advent of "net spend" so there is no way the clubs will vote for a salary cap as there will be no other way for them to flex their financial muscle to attract the best players.
A European super League is an option but a club would need to opt out of their domestic league or field a "B team". Can you imagine the effect on the SPL if Celtic left it for some reason, the other clubs would be in uproar and I could see this happening in England too. You could also say that the Champions League is already a European Super League.
I don't know what the answer is but league domination by the clubs with the most cash is nothing new.