First, can you be more specific about which framers you are referencing? They were unique and often fought rigorously with each other. Primarily, they sought to write a constitution that would work better than the Articles of Confederation did to keep the states united, and to do so they had to give the national government more power than the articles of confederation did. However, many deeply feared that the national government, more than the state governments, had the potential to become tyrannical. There were Federalists and Anti-Federalists, some wanted a Bill of Rights, some didn't. The slave states compromised with non-slaved States by counting slaves as 3/5 of a person in order to appropriate legislative representatives. The Anti-Federalists of the time would likely think that our federal government has way too much power.