Don't mistake a country and the regime that is leading it. Is punishing a whole country (so including the population) an efficient way to change a regime behav

Don't mistake a country and the regime that is leading it. Is punishing a whole country (so including the population) an efficient way to change a regime behaviour? I'm not sure history proved this right... Just look at Cuba ... Cutting all ties with a country makes the population even more dependant to the actual regime since there's no more direct exchanges with other countries. It also removes some communication bridges would limits the influence of the regime on censorship. Keeping some economical relationship with the country is not giving full support to the regime, but a way to keep an influence. I'm not saying there's no economical interest behind, of course there is, but the "ban" approach is unlikely to change the situation in a good way in the first place.