One law for Chelsea, Arsenal and Man Utd

What is the point of imposing sanctions on football clubs when they cannot be enforced?
Time and again big clubs are punished only to appeal and get off.
Chelsea's crime was to poach a young player. They induced him into breaking his contract against Fifa rules.
Predictably, the transfer embargo was lifted on appeal to the Court of Arbitration for Sport.
True, it may be reimposed but how likely is that?
The punishment here would have worked as a real deterrent to big clubs, who rely on buying success, and served to encourage smaller ones to develop talent.
In that way they could level the playing field and one day become a big club.
If not, they would get a decent price for a talented player to buy in a replacement or reinvest in youth.
Arsenal's appeal for Eduardo's dive is another example of big clubs avoiding sanction when clear offences have been committed.
And now Alex Ferguson weighs in with another rant at the referee in the knowledge that he cannot be touched.
Young players are taught by the FA to respect the referee and respect the rules.
But where is the example to follow?