Tariffs cannot replace income tax to fund the government. It's just not enough. Because the higher the tariffs, the higher consumer prices, and less the American people will purchase. Reduced purchasing will decrease the amount of income from tariffs the longer the tariffs remain in place.
You cannot tax the American people into prosperity, which is exactly what high tariffs seeks to accomplish. The same goes for excessive sales tax to compensate for low or no income tax. The burden falls predominantly on the poor and middle class while the wealthy proceed as usual. The result of this drastically reduced purchasing by the majority of Americans is fewer businesses able to remain in operation, and a self-reinforcing inflationary cycle.
High tariffs —> higher prices —> less purchasing —> fewer businesses —> less tariff revenue —> higher prices
This cycle will drive the United States into a depression, creating a multitude of social crisises similar to what we saw in the Great Depression. We could be looking at 20 or more years of abject poverty, and the destruction of the middle class as we dig ourselves deeper and deeper into economic dispair.