the Hauser peice which is what pretty much everything is based on is largely bollocks.
Ultimately there is oversight by WADA on everything USADA do. And if USADA were ever caught doing anything nefarious it would have a huge impact on the whole of US sport, as happened to the russians.
Politically and financially USADA would have had more to gain by being "cosy" with Marion Jones, or Lance Armstrong.. they didnt..
They arent going to risk the future of US sport over Mayweather (and certainly not over an irishman)