I highly doubt that's the case... But even so, that would be more a case of corruption.
They really dont, you may remember that NOP was tore down thanks to american anti doping efforts...
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Anyway, contrary to you, I believe this sanction is a new dawn for the fight against doping. I for one think that anti doping policies have so far miserably failed. There are many reasons for that, but one that seems primordial to me is that you can't expect bodies (national federations and NOC) that have, a priori, zero direct interests in fighting against doping to do so. Sure, you may find some good guys who will be willing thanks to some sort of morality or health concerns. But, don't count on them to be a majority...
Bottom line, you have to assure these bodies have a personal interest in trying to fight against doping. Having collective sanctions, excluding whole sports or even whole nations from the Olympics is a great tool to achieve just that.
For instance, I believe that every olympic sport should have a policy like weightlifting.For a start...