There are a number of original source materials available for studying the U.S. Constitution, including notes on the 1787 Constitutional Convention and articles written in favor of ratification (The Federalist) and against (the anti-federalist papers). The ratification debates held in the various State ratifying conventions are also very informative.
The man who raises cows and bulls has valuable assets, but livestock is difficult to carry in your pocket and not practical for dividing into small denominations. Animals also live for only a few years. The fisherman has lots of fish, but they also die quickly, and not everyone even likes fish.
Nearly every government eventually becomes greedy and seeks to steal more from its people than it could via simple taxation. Tyrants in the federal government always wanted to control the money that the people used. Alexander Hamilton wanted the President to rule over the Americans for life with massive powers, and he wanted the central government to be quite authoritarian.