They should go for everyone, ranked by income. One year I got a paper mail from IRS where they said that there were potentially unpaid taxes, but it could be t

They should go for everyone, ranked by income. One year I got a paper mail from IRS where they said that there were potentially unpaid taxes, but it could be that you haven't filed Schedule D form for RSU. I was very pleased with it - it clearly stated what I didn't do, what I should do (file needed forms), how to contact etc. I updated everything providing what was needed and sent it, everything was ok. Comparing to the messy interactions with tax guys that I had long time ago in my former home country (with hints of needs of bribes), when I was leaving it, I'll rather have to deal with IRS any day.