Games : How to carry over some transfer budget into new season?

In Fifa 15 career mode unfortunately transfer budgets do not carry over from one season to the next. Nuts, stupid decision, EA - makes no sense.

Well - I have read that many people claim the solution is to first shift all your funds from transfer to wages and then extend a contract of a player you don't want giving him a salary that is 100% the salary you can afford.

I tried this - In my case that's about 1 million euro on a player of about 65 rating. Problem is, that in the next season I can't seem to sell the player. Clubs show interest and I accept - however, they seem to never agree with the player on the terms of the new contract.

What am I overlooking at this glitch? Is there an upper limit on the wage relative to their rating? Is there another option to carry over the budget?