It's far more than a right-wing politics issue in Germany. The most dedicated supporters of coal are within the social democrats and even the left party has some vocal coal supporters in some areas.
It seems to me that the easiest way for a Germany to cut on energy needs is simply by having less people live there. I expect they would have been at negative population growth without shipping in a scad of people.
Likewise, the cost of less people living there (or in any defined region) is less taxpayers, less people making stuff, and less people supplying stuff.
In any case, what really matters is the per capita wealth, not total.
(On the other hand, stupidity and political short-term-ism are exactly why we now have problems with loss of biodiversity, antibiotic resistance, a disrupted nitrogen cycle, phosphorus waste, a quarter of the CO2 in our air being artificial, boom-and-bust economic cycles, etc.)