I am unaware of any place in the world today where the vote of the common person actually puts someone in a position of political power.
It is certain that in the countries with the largest economic flow, the politicians are put in place by corporations who finance their campaigns, manage the media propaganda, and control the actual electors (for instance, in the US this is the Electoral College; in the US, the popular vote is only for show.) So in the end, those who put politicians in power are those with economic power: bankers, CEOs, etc. And yes, they acquire karma for all of that, even though ultimately it is only a "chess game" whose outcome is already certain, determined by the karma of the era. Each player on the board is simply playing a role, necessary for the process of karma.
That is why Samael Aun Weor said we should not judge politicians; they are only pawns. The real question is: who is telling them what to do?