No doubt we should rid ourselves of much of the federal government - get it back to the levels intended for our constitutional federal government. I can easily imagine - and even use my votes in federal, state, and local elections to demand - a government without all the bureaucracies, departments, and programs that we should not have at the federal level. (state and local governments are another topic.)
But even if we were to pare it down to the basics, we would still have the need to fund the functions and expenses of the federal government. And funding it means taxation.
I don't know why you believe income taxes to be Marxist. That claim simply does not hold water. I assume you are speaking specifically of the Marxist ideal of redistribution of wealth? (I cannot think of any other way Marxism could possibly apply to income tax). If so, even with a deliberately progressive income tax, it would not be Marxist simply through the collection of taxes by ANY means. What constitutes (or does not) Marxism from government, in relation to taxes, comes about by how those taxes are used, not in how they are collected. When taxes are used to support entitlement programs for the poor, THAT is redistribution of wealth (Marxism), even if taxes are derived from consumption taxes. Conversely, how is using income taxes to build the infrastructure for which the federal government is constitutionally responsible, and paying for the components of national defense for which the federal government is constitutionally responsible, any more "Marxist" than using some type of consumption tax to achieve the same ends?