I don't think that is absolutely correct that you will hold people accountable for creating corrupt leader. So in a democracy, before a new government is formed they conduct election for the candidates who have shown interest to to be voted for, so you can only be correct in your submission if people did not come out to vote their choice and most times the people have majority of their vote to one candidate but what happens after election is what determines who the few in power want and they will manipulate the result of the election and announce a wrong candidate. In this case would you say the people voted a corrupt leader?

The bulk of the people leading are not the choice of the people especially in third world countries where corruption is very high.

Therefore, it is not the fault of the people that their leaders are corrupt.