Would you not agree that government ministers who can impose economic sanctions on the Lukashenko regime have more power than regular voters since they sit at the top of the power hierarchy?
I definitely support asking our governments to pressure their government. But I wouldn't ignore the fact that people in Belarus are be the ones that might be able to affect real change in Belarus.
Separately, I would expect American sanctions to push the country towards increased trade with Russia and China -- who are both allies of Lukashenko.