I'm saying the founders gave a rough sketch, and in this case that sketch was too vague to work right. We'd either need to fix it, or accept that it won't work. It's quite likely the founders would've accepted it, maybe not even included this restriction if they knew it wouldn't work, or done a better job drafting it. Still, their system as a whole worked well enough, and provided means for its broken bits to be improved. If some part is important now, we can still fix it. If not, why worry about it? Build momentum, propose an alternative, and maybe it'll be fixed. Our government isn't a shrine to long-dead people -it belongs to the people alive today.
It's also important not to treat the founders as if they significantly agreed with each other. They didn't. They had huge differences, long debates, and like any representative government, they had an enormously difficult time reaching agreement. Our first government failed. We're in a heavily evolved descendant of the second try.