I mean yeah, I'm extremely uncomfortable with commercial ID solutions when accessing government services. When I can I even avoid government websites that have captchas or other third party resources on them but that's becoming increasingly unworkable. It's absurd that I should be required to leak my personal information to third parties in order to make use of a government service (ie something with no competition that I am legally obligated to use).
For the IRS it doesn't even make sense because I can drop paper forms in the mail. Don't need any ID whatsoever for that.