Section 2 Clause 3 Representatives and direct Taxes shall be apportioned among the several States which may be included within this Union, according to their respective Numbers, which shall be determined by adding to the whole Number of free Persons, including those bound to Service for a Term of Years, and excluding Indians not taxed
Section 8 clause 1 The Congress shall have Power To lay and collect Taxes, Duties, Imposts and Excises, to pay the Debts and provide for the common Defence and general Welfare of the United States; but all Duties, Imposts and Excises shall be uniform throughout the United States;
section 9 clause 4 No Capitation, or other direct, Tax shall be laid, unless in Proportion to the Census or Enumeration herein before directed to be taken.7
Yes it's unconstitutional but the only way to get rid of it is revolution.
This will not get you out of paying your mortgage, that comes under contract law. One of the reasons the Articles of Confederation failed was because they contained no provision for forcing the repayment of Revolutionary war loans, Foriegn investors , afraid of not being repaid were not investing in America. The "Industrial revolution" was not possible until the Constitutions protection of debt came into affect.