Dropping German consumer demand has nothing to do with competitiveness and trade surpluses.
I'm curious as to your reasoning about why people do anything other than the absolute minimum to receive their paycheck.
You're presuming a fixed demand for labour, regardless of how much value it provides. Imagine if, for a moment, productivity increased to the point where one person could do all current work for all current employers, but of course there were many, many other people who could provide the same productivity. Do you expect that employers would not figure out a way to use some of that additional productivity to make more money?
The demand for a product increases as value it provides increases. The net effect is that employers' profits increase, but so do labours'. The divide on the split is determined by relative strength of their positions, but if it ever goes to zero for either side, it really kills the incentive for increased productivity in the first place (if employers see no benefit from increased worker productivity, there certainly won't be any more demand, and there will be no effort to exploit this new productivity... if employees see no benefit from the increased productivity, they'll have no incentive to be more productive).
If incomes stay the same, you would expect the price level to fall (aka deflation).
Look at real total compensation growth over that time.
The idea that the average worker is not better off now versus 1970 is not a reasonable take.
it's almost as if forcing completely disparate economies onto a one-size-fits-none currency with a single interest rate and no fiscal transfers was a monumentally stupid idea
It’ll be interesting to see how that strategy works now that we live in a new geopolitical reality. Unlike us in Scandinavia who will have to start from scratch, sort of, Germany already has the means of producing and an infrastructure in place to expand it rapidly. It’ll take some readjusting, but once the non-EU competition gets hindered political means, there is no reason the wages shouldn’t increase. Especially because the steam was already running out of the cheap labour schemes.
Maybe it’ll turn out Merkels bet on keeping industry was even further reach than we thought.