The founders could not have foreseen shifts in population demographics the like of which have occurred in the last 200 years. The urbanization of our population has been staggering during that time, and the percent of people who own or work on farms has dropped to nearly a rounding error, compared to most of the people in the world.

The idea that we must worship every aspect of the founders' thoughts on the makeup of a country, when the world has changed so drastically since their lifetimes, makes no rational sense. Sure, a lot of their ideas (checks and balances, good!) are still relevant. Others (slavery, no women's suffrage, bad), not so much.