> Throughout history, revolutions only succeeded when there were enough privileged people on "their" side (eg. those with money, status...).

Counterpoint: what about the French revolution?

You are absolutely right that it's easier to have revolts led by the privileged - the American revolution was one. I'm sure there were plenty of others.

As for sanctions causing regime change, you may be right. But that's also not the goal here - the goal is to tank Russia's war effort and generally cause pain for him and his cronies. Of course plenty of people are probably hoping regime change will result but I doubt it'll be a direct consequence, if it happens at all.