They don't really. They misreport the value for tax purposes, they own it through some other legal entity that is all negative, they own it through a company that negotiated tax rates to have some other business happen there, they own it in countries that don't to property taxes, etc. etc.

You can be damn sure they're paying at most a tiny fraction if not zero of any tax rate you'd be paying for that asset as they'd much rather pay very good lawyers, accountants, and most importantly, politicians to not have to pay tax.

You don't need progressive taxes. You just need everyone to pay it equally, without loopholes. Fewer less complicated tax rates are harder to work around.

Food production isn’t some homogeneous entity, it might make sense to subsidize some level of staples but direct subsidies are more transparent and can be more easily limited. But, obviously industry doesn’t want the government feeding through to stop simply because the’ve scaled vastly past domestic consumption.

Similarly, military procurement can subsidize relevant industries without impacting the wider economy. In other words you can maintain some domestic steel production etc without impacting the cost of goods.

There’s many industries that have moved beyond sweatshops due to automation.

Pepsi can’t get glass bottles from 3rd world sweatshops at anything competitive with a highly automated factory. In the vast majority of industries it’s just a question of levels of automation and climate control inherently makes automation easier by reducing variability in temperature and humidity. Of course the original distinction around climate control that created the term sweatshops is dying as such operations are largely dying out, but that only reinforces the notion of automation killing off the inherent advantages of unskilled cheap labor.