I don't doubt that both parties probably paid polling places to count the votes in their favor- LBJ probably did the same in a few areas in Texas much as he did to get elected to the Senate in 1948. That is a different question from A) whether the quantities involved were large enough to swing the election, and B) whether Cook County in particular stole the election by having a huge number of dead people vote, which is the popular myth, and what I was addressing in particular in this case.
If you know if a critical examination which shows this to be the case let me know. I'm open to the possibility, I've just never seen the case presented with much more than hearsay. "I heard from a guy on the radio" is probably not the standard of evidence you want to use to say he "absolutely bought the election"