It looks like the ENIC model is to follow the Dortmund route.It's the wages.
ENIC don't sign this profile of player because they don't want to pay big salaries.
They improve the wages of some players, while retaining them on longer deals, in the hope they will recover the increased wages, further down the line, from an incoming transfer fee for the player.
ENIC never hesitated to sell Carrick and Berbatov. They didn't want to pay these players the wages they deserved and that were being offered to them by other clubs who would.
ENIC stuttered in selling Modric and Bale but only because they knew they wouldn't get away with once again selling them, to other English clubs, without incurring the wrath of the Spurs supporters.
They came up with the Real Madrid 'special relationship' to pull off those sales. Real Madrid got Modric and Bale; Spurs got Van der Vaart for two seasons and the 'magnificent 7' bunce.
The overall Spurs wage bill is what ENIC have been looking after. How else could Levy pay himself his salary and bonus?
Player agents have been getting wiser to ENIC and Levy's methods as the years have gone by.
Several of Spurs best players, from Poch's team, chose to run their contracts down rather than request a transfer or agree a deal with a buying club.
It is this that has killed ENIC's business model.
They are fooling nobody anymore.
Managers are reluctant to work for them, the best young players will not sign deals and the supporters continually accept what is presented to them.
Levy must know he is now on borrowed time.
ENIC have to invest in the playing squad or sell to someone who will.
No way out this time.
The alternative is to continue with the jam tomorrow trick, in the best stadium in the world, while it is half empty.
How long will that last?
Secure young players before they really start to get out of our reach, get them polished up, then accept bids from rivals for big money then start again.
Dortmund were having a degree of success with this, then selling to Bayern when the player was ready to leave.
Ajax also have a similar model, the only difference is, that both of these were winning the odd trophy here and there, probably because the league has less challenger's in it.
ENIC don't want to have top players on big salary's, their ideal is to charge Harrods prices, but have the employees on minimum wage.