So too would have been the dominance of corporate interests in the political system. But here we are.
Why again do we really care about parsing exactly what the Founders would say about the modern world?
This is important for two reasons. The first is obvious - we did something very right. I don't think there's any single thing you can pinpoint as the secret sauce so I think it's very important to learn from and consider our entire system, its motivations, and rationale in a comprehensive but holistic fashion.
The second reason is perhaps even more important. Do you know what every great superpower before America has in common? They no longer exist. And in many cases not only do they no longer exist, but their former territory is in shambles. It's amazing, and disconcerting, to imagine that Spain was once a global superpower. The point of this is that it's critical to learn from the past, lest we repeat it. The stories may change, but the fundamental problems and decisions that nations face remain quite similar.
How'd that work out?
Anyway, extending the franchise doesn’t really have anything to do with the prominence of the federal government, whereas the increasing power of corporations does.
Who's likely to be able to bring a software system from 16.7.1 to 16.7.2? The team who built 16.7.1, or the team who wrote the pre-alpha version twenty years ago?
That's where things started breaking down.
The 17th Amendment just made things worse.
The modern welfare state, where millions of people are immediately hurt by the federal system grinding to a halt and stopping, would have been anathema to the framers. Nevertheless by popular vote such programs have been federalized and now we have a constitution that doesn’t support their smooth operation.