First of all we must understand what actually individual liberty means. Individual liberty means that every person has the right to make choices that they like to go with. This right includes right to express opinion, right to trade, right to live where desired, follow religion that one desires, right to vote and associate, etc.
So the Limited Government (A government that is bound by constitution) to support individual liberty by delivering the above freedom to its people through constitutional amendments, by protecting these rights of the people through implementations of laws and provision of justice.
Loss of factory jobs led to less in the middle class or you needed to work a white collar job to be middle class.
Industrial jobs moved overseas leaving those working in factories without jobs. Middle class jobs no longer included factory work but rather service jobs many requiring college degrees.
