If you walk into any retail store, someone will gladly spend their time to sell you an item worth just a few dollars. With the IRS, you are sending them tens of thousands of dollars, yet never have any human interaction?!!
Why can't they spend at least an hour to do a "quick audit" ? Just by asking a few simple questions they could easily determine if something fishy is going on or not. Then they can recommend you for further auditing.
It just seems so weird to have no human interaction given the incredible amount of money you send them!