Unfortunately your suggestion doesn’t carry much economic affect on Germany. We pulled 95% of our troops out of Germany between 1993 and 2007, after the end of the Cold War.
There are about 34,000 US Army and US Air Force personnel currently in Germany. The only Army combat unit in Germany is the 2nd ACR at Grafenwohr/Vilsek Training Area. USAREUR HQ is in Wiesbaden. There are still a few maintenance and supply depots and a major hospital around Kaiserlauten. The USAF has a couple of air bases left, Ramstein and Bitburg. This map shows all of the locations for US forces in Germany as of 2014: https://en.wikipedia.org/wiki/United_States_military_deployments
Nearly all of the US Army garrisons that existed when I was in Germany for my two tours there are now closed. The 3 posts I actually served at have been closed for 15 years.
Grey Friar
We were responsible for the short range air defense of Bitburg (B Battery), Spangdahlem (A Battery and Bn HQ), and Hahn AB's (C Battery). We also had an Ordnance Detachment for systems repair. Our conventional motor support was out of Baumholder.
As a bachelor, I had a fair number of TDYs, such as an augmentee for Reforger 77 and Admin/Log XO at Todendorf during the summer of 79. Those 3 months at Todendorf were among the most fun of my life: I usually was acting CO as the CO was dealing with personal issues at home. We were the only Americans for 200 miles, and all of the newly divorced women on holiday in Lutjenburg fell in love with my soldiers...lol.
At C Battery at Hahn, I had both Chaparral platoons, and one of the Vulcan platoons, plus 6 months as (blech) Systems Maintenance Officer. I was kicked up to HQ during 79, where I was an Asst S-3, Asst S-4/Property Book Officer, and S-4 during my last year.
It was an unforgettable tour, leaving me with dozens of stories...that are interesting only to myself...lol.
Spangdalhem is still open.