Wait till they hear about actual passports!
Also there is quite a bit of economic work that showcases the positive impact of removing such stringent barriers to the free movement of people.
A driving license is a license is a certification that you've proven yourself capable to meet the minimum requirements to operate a potentially dangerous device, and more akin to doctor's license, lawyer license, etc. I don't think it's really the same thing.
My concern isn't really with "government can do $evil_stuff", but more in the general restriction of things.