As just one example, the Postal Service has a multi-billion dollar line of credit at the U.S. Department of the Treasury. Hey, we could all use a few billions, every now and then, to get us over the rough spots. But we are not the Postal Service.
Theoretically, the Postal Service is going to pay it all back some day, and that theoretical possibility keeps it from being called a direct subsidy. The Postal Service is also exempt from paying taxes, among other exemptions it has from costs that other businesses have to pay.
Exemption from taxes, and from other requirements that apply to other businesses, are also not called subsidies. For people who mistake words for realities, that is enough for them to buy the political line -- and to get huffy with those who don't.
Loan guarantees are a favorite form of hidden subsidies for all sorts of special interests. At a given point in time, it can be said that these guarantees cost the taxpayers nothing. But when they suddenly do cost something -- as with Fannie Mae and Freddie Mac -- they can cost billions.
One of the reasons for so much presumptuous ignorance flourishing in our time may be the emphasis on "self-esteem" in our schools and colleges. Children not yet a decade old have been encouraged, or even required, to write letters to public figures, sounding off on issues ranging from taxes to nuclear missiles.
Our schools begin promoting presumptuous ignorance early on. It is apparently one of the few things they teach well. The end result is people without much knowledge, but with a lot of brass.