Dunno about blaming Congress...
The Founders actually expected the Electors to exercise judgement and refuse to cast their votes for persons considered ineligible, or even inappropriate, for the office.
The entire American Experiment depends upon decently bred, well read, western Christian gentlemen exercising good judgement at every level of society, but particularly those in elected and appointed posts.
So, Freddy, you can see where this thing of ours is going.