Boogeyman represent fear.
Unlike in our current time, there are only a handful of companies that established, which mean that competition is very little.
As soon as a company with similar market arose, many businessman in the past became worry about the continuity of their companies
hope this helps
None of them are really more powerful than any other they share the power and the all play a powerful role in our us government, to prevent any branch from becoming to powerful they would use a system called checks and balances.