Do we let them drive over here with no license, I don’t think we do.
It’s their law and it’s not hard to get a license at all.
Germans take driving very serious! And you’re right. It is their country.
Apparently it is now. Things have changed there in recent years, and it's not like it was in the 1970s-1990s for US service people stationed there.
In Germany? It’s hard as blue blazes and very expensive to get a German driver’s license.
http://en.wikipedia.org/wiki/Driving_licence_in_Germany#Obtaining_a_driver.27s_license
“The cost of obtaining a license for driving a car is on average 1400€ (US$1800 in September 2014)”.
I’ll add that this does not include the expensive German automobile insurance, very detailed mandatory annual vehicle inspections, and that it is strongly recommended that you know those German vehicle laws with enormous fines for violation. And really expensive gasoline (right now about $5.57/gal).
The bottom line is that Germany has very good public transportation, and they actively seek to dissuade people from driving.