Some of the areas/functions the federal government should not be involved in per the constitution (see enumerated powers of congress and the Bill of Rights, the 9th and 10th amendments, etc): Health Education Welfare Housing Mortgages Student loans Subsidies Health insurance Retirement insurance Mandating insurance contracts of any kind Trade unions Government workers unions (huge conflict of interest) Jobs (other than not creating an environment that kills them) Banking/finance Free markets The stock market The economy (other than not overstepping its constitutional bounds and creating havoc) The working environment Global warming Crime in general (other than treason, piracy, counterfeiting, etc)...