I would just add that the russia thing is a direct consequence of the judge's system change (where russian officials are very much involved). The reason why russia was dominating medal standings for women (and not for men or ice dance), is precisely because russia could afford a stream of pre-puberty girls who win a medal at the cost of their physical and mental health.
Also, needless to say, the russian sport system is still a direct copy of the soviet sport system, which was essentially created by Stalin when USSR first decided to participate in the Olympics in 1952 (guess, why USSR didn't care about the international sport before WWII). The way how sport is organized in russia goes against the sports autonomy principle that is sacred in democratic countries and is embodied in the Olympic Charter and European Sports Charter.