Citation needed.
I would argue the point is actuallly the opposite: Capital gains taxes are actually lower than income taxes on your salary. Properties do have an unfair advantage, though, because they can be sold tax free after 10 years.
We do need something like a 401k. But if you read the election manifestos of different parties for September, they are indeed in there.
Here are 2 links that explain in detail [0] [1]. I'm sorry I misinformed you about Steuerbescheinigung - it's not visible there, but it is when you do Steuererklärung with smartsteuer.de.
[0] https://www.lohnsteuer-kompakt.de/fag/2020/2895/was_ist_die_...
[1] https://www.fondsclever.de/ratgeber/lexikon-investmentfonds/...
I will try to provide a screenshot from Steuerbescheinigung that Scalable Capital sent me a few days ago.
Also, if something like 401K (with matching, hehe) is really implemented one day in Germany, it will be a big step ahead. Right now people are constantly robbed with various corporate pension plans that just pour money into Allianz and other insurance companies for "only" 2% TER.
Just resorting to whataboutism at every step doesn't magically make rents in Germany cheaper more easy to obtain for those in Germany.
The fact that Parisians or Londoners or Tokyans(is that even a word?) have expensive rents doesn't help me when I live in Germany since they're completely different markets and I only compete in my local market, not with those in Paris/London/Tokyo.
Whataboutism is to use a different issue to show that the first issue is not that big, even though the second issue does not actually take away from the first issue and the first issue is worth discussing on its own.
What I am saying is: Rent in Germany is relatively inexpensive (even compared to income and especially compared to property prices). Because how do you determine if something is inexpensive? You compare it to something else. Comparing prices to determine if something is expensive is not whataboutism.