I don’t think scantions work.
They certainly never achieve the intended objective, that is, change the system and government to US compradors, but they do work greatly in causing horrible humanitary effects. That's about US sanctions, who up till recently basically controlled global financial system, and also like to bomb, invade, sabotage and incite riots in sanctioned countries to make things worse. For sanctions like Canadian, they aren't very impactful, more of a political statement.