Ok, lets get one thing straight, Erik Zabel was never suspended for doping. He confessed to doping this year for doping in 1996, along with tour winner Bjarne Riis and the rest of the Team Telekom. In Fact he participated in this year's tour.
First of all, the pelaton is no longer the simple "Mafia" you refer to. But it used to. from the 50's well into the 80's. Powerful riders such as 5 time winners Eddy Merckx, Jaques Anqutiel, could conrol the pelation, and any doping testing, in fact, If they were threatened with testing, they would strike, or refuse to participate. Teams were inexpensive, and cheap to run, so sponsorships would change quickly. Teams would do anything, to keep quiet about doping.
But that changed greatly. first of all Cycling has become an expensive sport (From 2 to 20 million a year) and they are lesser compaines interested in the sport and supporting teams with doping. No company wished to have this stigma, (Like the Festina Affair) So When Companies pull out, they don't come back.
In 2005, Liberty Seugros (Liberty Mutual) found themselves in the "Puerto Affair", They yanked their sponsorship immedately, never to return. Even Teams like Discovery Channel, pulling out of sponsorship this year, who just had a tour winner and run by Lance Armstrong, has not find a sponsor for next year.
Teams must have sponsors or they will be no cycling. So Teams like CSC, Team Telekom, have installed their own, anti-doping programs. In order to protect the team, not the rider. in fact both teams, in 2007 have fired riders, for violating the teams anti-doping rules.
Young riders are being more vocal about not doping,
The very fact that riders like Vinokorov, and Cofidis, riders Christain Moreni, were caught during the tour, says a lot.
Rasmussen, knew the rules of his team, and he lied, and they fired him. Plain and simple.
Cycling isn't perfect but it has come a long way, at least they are trying to change the culture,
I can't say the same thing about Baseball, Home run record about to be broken by a known steroid offender. And we applaud.