I think all these riders complaining about the questions now, including Froome, Wiggins and many others, were all part of the problem previously by their omissions rather than their actions.
They undoubtedly would have either been witness to or been involved in doping at some stage in their careers but chose the omerta. Now they're dealing with the repercussions so I don't feel bad for them having to defend themselves whether they're clean or not.
They were/are almost all part of generating the culture of suspicion we have now.
Reckon Wiggins would disagree with you
http://www.guardian.co.uk/sport/2007/jul/29/cycling.tourdefrance1