Peter Danckert, the president of the German parliament's sports commission, called on Thursday for public funding of the German Cycling Federation to be suspended in light of Patrik Sinkewitz's failed drugs test.
"If no severe sanction is taken in the fight against doping, then we need to think about stopping the funding of some public bodies," Danckert said after it emerged on Wednesday that Sinkewitz had been found to have high levels of testosterone is his blood.
"Only the Parliament, who manage the taxpayers money, can act and we can't continue to support a sport which does not take the necessary steps to fight against doping."
Danckert welcomed Wednesday's decision of German television channels ARD and ZDF to stop broadcasting this year's Tour, until the Sinkewitz case is fully explained.
He said: "It was the right decision, it is necessary to do something. Things must also change on the Tour de France. The stages must be shortened, a day of additional rest must be introduced."
Sinkewitz, under contract with T-Mobile, was informed on Wednesday that his A sample from June 8, taken during a training session, had tested positive.
"Patrik is suspended and if the B-sample is also positive for elevated testosterone then his contract will be terminated," said T-Mobile team general manager Bob Stapleton. "This is an athlete who committed to our Code of Conduct. If he stepped outside that, it is extremely disappointing."