Reduce Taxes & Bureaucratic Regulation
The power to tax has been recognized from antiquity as the power to destroy. Taxation is just, if those being taxed are represented in the decision-making processes of government, if the revenues derived are spent exclusively on the proper functions of government, and if they are apportioned according to the benefits derived.
A fundamental principle of economics is that you must have income before you can pay out. Some one has to pay the bills of families, businesses, and government. (If not this generation, then the next one will, with interest!) A case could be made that the current expenditures of government are too great, since the economy could never generate enough tax revenue to pay the bills. In that case, there must be either a reduction in the size and scope of government to balance the expenses with the projected income, or policies that allow the economy to be more productive must be formulated and implemented. Reduction in bureaucratic machinery and the deregulation of business would actually do both! (An equally good case could be made that that the tax load is not heavy enough, because it doesn't generate sufficient income for the current expenditures of government! Do you want someone with that point of view balancing the budget of the federal government?)
Entirely aside from the mathematics of the issue, there is the matter of authorization. At the federal level there are certain things authorized by the Constitution, and under the terms of the Tenth Amendment everything else is forbidden. If all unauthorized activities were to cease and all unauthorized assets held by the federal government were liquidated, there would be a surplus of tax revenue to apply to retiring the national debt.