“Pay reparations to Poland.”
Shouldn’t the entire state of West Prussia now being part of Poland count as reparations of sorts? Prussia used to be (arguably) the most important German state; now none of it is in Germany. And during reunification in the early 1990s the Germans permanently renounced all claims to Prussia or any other land they lost after the WWI & WWII.
Germany may be well-to-do but if they pay money to Poland they will have to pay several other countries too, which could be disastrous for the German (and thus the larger European) economy—unless we’re just talking about nominal fees to make a point. The most productive reparations I can think of for today’s circumstances would be for Germany to quit trying to force Poland to take in hoards of “refugees.” That would be a great benefit in the long run.
East Prussia, not West Prussia (West Prussia was lost after World War I). But don’t forget Pomerania and Silesia.