Do you know of any major German industry for which energy costs amounts to even 10% of the labor costs? It's a rhetorical question intended to engage the common sense pathways of your cognitive system.

Realistically, without running the numbers, only few industries come to mind that may come close. Chemical manufacturing, steel production and maybe glass production as well.

For the remainder, the wage costs - more specifically - the overhead costs are the true killer. If you want to pay someone 80k a year in Germany, the actual costs are closer to 100k a year in purely salary overhead costs, not to mention the other bureaucratic overhead in Germany

Considering Germany wiffed on the tech boom, and still relies on the same industry as 50 years ago, I'm not sure if you are gesturing that 10% is way too small or way to large. Their three largest exports are all very energy intensive (cars, machinery, chemicals).