USPS is profitable, though. (even if Congress messes with their retirement accounting to make it look worse)
If they subsidize anyone it's China, because we forced them to do that by signing the UPU treaty. After that it's people who buy forever stamps.
Can you please provide some sources backing up your claim? What metric did you use?
The metrics that I would use, like the Index of Economic Freedom by The Heritage Foundation, seem to contradict your claim.
The fact that the state owns some companies in key industrial sectors and has stakes in others does not mean that the country's economy is primarily in the hands of the state.
[1]: https://en.m.wikipedia.org/wiki/List_of_countries_by_governm...
https://www.peoplespolicyproject.org/2018/03/09/how-capitali...
And I mean, yeah, nordic countries for sure participate in the free-market... but Capitalism is defined by private ownership; so when you have such important portions of your economy be collectively, socially or communally owned (state, coops, labour unions) it's misleading to use such labels so lightly. These are mixed-economies, and I would even go as far as to say they're more socialist than capitalist.
Socialism does have a bad reputation though. So I don't blame for these countries to label themselves as "capitalist"; i mean, it's better for business.
There is a big difference between governments owning things vs. exclusions to citizens owning things.
Though the extent of it really matters, I always hear "Norway is a capitalist country" when their economy is primarily in the hands of the state, more than for example Venezuela.
But people tend to point to Venezuela, and not Norway, as an example of a failed state owned economy.
It's not really about "sectors" of the economy that are publicly owned but actual economic output. The money in the US is produced and it is in the hands of private individuals most of it. In Norway near 70% of it is produced and in the hands of the state. Obviously Norway is a particular example because they're a country that relies on natural resources extraction. But you can look at other similar countries in terms of their exports (Australia, Chile) and see how the Norwegian model differs.
The USPS, for example, is a service. It's not really a business, it doesn't have to be profitable it ideally has to be sustainable but I wouldn't say it's a necessity. Not only that, it subsidised private businesses like Amazon.