Not after 2017, I think?
It doesn't change your point of course, I just find it interesting.
So if you're getting "the equivalent" of $1k a year untaxed, the IRS yawns.
If you figure out how to run your entire salary through airline points, the IRS wakes up.
(The laws are complicated to decipher, but they basically come down to the above. The tax courts will look at things like "is this available to everyone, how much was it, etc, etc".)
The pay you get is an expense to the company, and if the company buys and maintains uniforms, likely that is also, but it is not counted as part of your salary even if you get to take the uniforms home.
And self-employment makes it all even more complicated.