Your government has chosen not to buy computers that could perform the simple task these days of matching W-2 and 1099 withholding to an SSN-based file of individual taxpayers.  Fraudsters have known for decades that they can make up their own W-2 with lots of withholding and get it past IRS.  There are those who think investment in technology would be a better choice than some of the other things we spend money on. 

https://www.politico.com/cartoons/2021/04/06/april-2021-000190?slide=0