When you don’t pay your taxes the IRS will explore options to ensure you do. One of their last options to recover owed taxes is to garnish your wages.
A large difference between a government institution and other creditors is that the government does not have to go through the same legal channels to garnish your wages.
Before your wages are garnished a lien will be placed on your property. A Lien is a claim against all your property as security for payment of taxes. The lien will usually be placed on your property before or simultaneously as your receive your notice.