Look at big clubs like Manu and Arsenal
Manu got really big through use of their own produced players,
During the time.. SAF had nothing to lose because he knew that
whether he stayed or relegate Manu. He would be sacked
So he gambled on Beckham, Scholes and etc and they turned out to be
superstars and thus he was in control
Now, As those big names are old and being replaced. It would be
very dangerous to field a very young and unproven squad because
there is a chance of not qualifying for the CL.
Furthurmore, With the money Chelsea is spending, Manu fans and
other fans feel the need to win the EPL thus a season with a
unproven squad may see them finish somewhere below Chelsea and a
huge gap thus making fans unhappy.
I feel it's not that SAF don't give the youngsters chance to shine,
It's Chelsea who are forcing the unproven players out of contention
thus clubs have to spend big to match Chelsea.
Then, I feel that a limit on the number of foreigners (EUs alike)
to be limited so that more English stars can shine like Beckham,
Scholes, Gerrard, Owen and etc..