Good point.
Unfortunately, the 16the amendment explicitly allows for income tax to be levied. And realistically, the tax money collected is spent on whatever the president, Congress, or bureaucrats want to spend it on.
While I would support repeal of 16A because it ignores other tax-related constitutional clauses imo, I actually don't have problems with it for the following reason. 16A doesn't constitute an excuse for Congress to ignore its limited power to lay taxes, imo, which I indicated in previous post.
In fact, I think that the states should amend Justice Marshall's clarification of Congress's limited power to lay taxes to the Constitution where corrupt Congress can continue to ignore it. /sarc