I understand what you're saying here, but I don't like the implications. You seem to be saying that clubs and players should all behave in a way that preserves the status quo, one that gives teams the biggest teams in world football the inalienable right to look upon smaller clubs as feeder clubs.
I know we might struggle to prevent players wanting to join Barcalona or Real Madrid, but we shouldn't feel compelled to sell.
As a sentiment, it's on a par with teams like Barcelona thinking they should be guaranteed a place in the CL regardless of whether they qualify or not.
My opinion is not that big clubs should see smaller clubs as feeder clubs, but that smaller clubs should realise themselves, end embrace, their status as feeder clubs - and use that status to grow.
Look at Benfica, what they produce in terms of quality players, and results, and money. Look at Dortmund. Look at Monaco. And, I would also add, Ajax.
If the club sets out to build the infrastructure that allows players to develop, and show players that they are willing to be used as a stepping stone, they can attract some of the best talent on the planet and enjoy them while they are developing. To me, it's the most rational approach a big club in a smaller league can take. It's the only way that such clubs can hope to be successful over time, in my opinion. And the talent the supporters get to enjoy, for a limited time, whenever such clubs strikes gold - which is quite frequently, if set up right - should be more enjoyable than anything they could hope to achieve with other business models.
Note: I am not including the PSG business model, which of course could attract and retain more senior quality.
This "ideology" has the implications that I do not feel any resentment towards Bale or Modric, although I wish there had been less drama surrounding their transfers. Although we lost two great players, we got money to potentially help us improve beyond what we were with them.
And that's the thing. Whenever a smaller club sells a fantastic player, it can buy a slightly worse replacement and upgrade two or three other positions for the cash. Sometimes it doesn't work out, but often it should.
And, more importantly, the players' needs has to be respected. I know they are filthy rich, that they have signed the contracts without a gun to their heads. But they are most likely either encouraged or required to sign for many years to land their deals. Having a player tied down for his best years in a club below his level is not good for football in general, as it's poor use of resources, and it certainly is not good for the player. In many cases I would also argue that it is not good for the club that owns said player.
Now, does that mean we should allow Alli to leave for City should he want and they come calling? No, because we are direct rivals for the PL. Van Dijk to Liverpool? No, because Southampton are expected to be a couple of places behind Liverpool and given a fortunate outcome they could overtake them. Van Dijk to City? Maybe. Van Dijk to Barca? Yes, if they offered a reasonable fee.
Davinson Sanchez to Spurs? Yes, if the fee offered is reasonable.
Is this the same as saying Barca or any other team should get automatic qualification for CL? Of course not. Far from it.