I hate to have to refer to SLC 2002 again, as this just makes my French half very ashamed, but... SLC 2002!
Even when there was a real scandal with people found guilty (that wouldn't be possible that clearly today), "Both Le Gougne and Gailhaguet were eventually suspended from the sport for three years by the International Skating Union, which never made any serious investigation into the events." ... and then things came back to what they were before: Didier Gailhaguet resigned as president of the French Ice Sports Federation on 12 May 2004 (he wasn't even fired!), but was re-elected to that position in December 2007. He is considered the most likely to be the successor of Cinquanta as future President of the ISU.
So to sum it up, I'd say the ISU has a very pragmatic approach to scandals and controversies: "sit and wait, there's nothing they can do anyway". They awarded Salé/Pelletier with additional Gold Medals due to being pressured by the IOC. The ISU would have been fine with doing nothing. Their slogan should be something like:
ISU - yeah, well, what are you gonna do about it?