You're not going to spend 10% for "everything", only imports. And it's not going to necessarily be 10%, it's going to be whatever it needs to be to get the country back to full employment and restore our industries.
And yes, if we put Americans back to work, we will spend a lot less supporting them. Or maybe you think it's cheap to support 100 million Americans on food stamps.
Let's take a momentary look at the contradictions in the above statement--I will spend 10% (or some such figure) more for imports, as I pay the tariff to the government, and I will pay 10% (or some such figure) to the domestic company, as some form of a subsidy. It's all about saving those high-paying jobs, I know . . . so spare me the sob story.
And the food stamp roll will continue to increase, because Washington D.C.