What groups began to demand a strong national government to protects their interests?

The colonists believed the power should be in the hands of the people. Not only did they create a weak federal government, they restricted the powers of the state governors because they were so concerned about the leaders abusing their power. The federal government couldn't do many things which it can do today.

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the lowest among the social higher rank were the working class. this class remained detached to the political progression   of the country and was hostile to the other two classes

powers  are  denied  to the  national governmentin three distinct ways: some  powers, such as the  power  to levy duties on exports or prohibit the freedom of religion, speech, press, or assembly, are expressly  denied  to the  national government  in the  constitution.