You do not seem to understand how America's position in the world has been used to benefit the country in a massive way post world war II. You can throw that position away, that's your privilege, but the result will be a much smaller economy in which your costs for various items will go up rather than down because a lot of money will no longer flow to the USA.
The amounts you are paying for healthcare, medication etc are not coupled to that but are coupled to your broken political system. You could fix that easily enough but neither the democrats nor the republicans have ever followed that path because you (plural) have been deluded into thinking that that is socialism.
Reducing the USA's standing in the world is not going to fix your political problems but is going to harm your economy in a massive way. The position you are taking here is not consistent and whether you voted for Trump or not is not relevant because it effectively carries water for him: this is precisely the kind of thing that an uninformed Trump supporter would say.