that would be very boring and very available for everyone, which means every kind of player's skills would be no longer a point of any effort
It will also make the transfer market completely obsolete, since you can simply get home-grown players at each position.
Hasnt the transfer market become somewhat obsolete recently anyway with transfer resale restrictions, this seasons taxes, staff acquisition costs and rising salaries?
Most established clubs now (who have the money) arent active unless a better player is available and only if they can trade up an existing player... I guess salaries will jump more than before and it will be interesting to see how many teams have increased their arenas sufficiently to deal with this.
If they havent then further deflation has to be around the corner.