there are riders who testified that never were caught. Therefore, there is no bribery, no "carrot". The guys like Landis or Hamiltion...did they ever race again? Did they ever keep their titles?
In fact the first 'whistleblowers' against Lance got nothing but scorn and harsh rebuke. What was the payoff for them?
People that still cling to the belief that Lance is clean, wouldn't believe it even if there was video showing Lance injecting.
ESPN more or less captures the difference between between believers and non believers pretty succinctly...
http://espn.go.com/espn/otl/story/_/...-whether-doped