Most educated Iranians hate their government. The problem is that a revolution isn't easy when the government has all the guns, and the military & revolutionary guard remain loyal, and have no problem with shooting masses of innocent civilians to retain their power. Sanctions that worsen things for ordinary people really isn't going to change much in countries like this. It would be much more productive to try turn t…
And by "hold power internally" I don't mean population uprising, I mean to keep the factions within the government (especially the military) united under the leadership by buying them out.
I believe increased population unhappiness is more of a side-effect that can be both beneficial (if it incites anti-government sentiment) or detrimental (if it incites nationalism) to the country imposing sanctions.