They saw some of it, but I don't think they ever thought about the levels of corruption that have evolved. Although the early elections were often bought with drinks at the polls.
You have to stop and consider that things were very different.
Only white, male property owners were allowed to vote. They only wanted educated men to be able to have ins to government as well.
When income tax was first voted in there was a measure to limit it to no more than 4% but they dropped that because it was considered too preposterous to even bother with.
The world was indeed very different and our founders worked together, though they did also fight a great deal over policy.
They wanted government to remain very small.
"That which governs least governs best!" was a common thread.