Have you ever asked what exactly are we talking about here? Just a King? No legislative bodys, no Justice department, no checks and balances?
240 years ago a King made rules for his own benefit, and enforced those rules with a privatly paid army at his beck and call.
230 years ago a newly freed people chose a much bigger Government. They chose a balance of Federal, State and Local governments in the fear that a concentrated power would become oppressive. They seperated religion to prevent one group from dominating others. They resticted the charters of corporations, and their renewals to legislative vote. And then they diluted that power even further with legislatives bodys to write law. Not satisfied they created an additional branch of Government to seperate those who made laws and those who enforced them. They created civil servants to reduce the financial pressure private interests could apply, and they created the ability to plead your case to a Supreme court removed by geography from local corruption. They seperated religion to prevent one group from dominating others. They imposed time limits on the charters of corporations, and their renewals to legislative vote lest wealth gang up to dominate the country. And finally they created elections, and made as many men as possible all part of Government.
They did not choose "small".