Compared to the US, you will not find many rich people in Germany. At the same time you will also not find many poor people. Generally, people are quite equal in Germany.
Maybe the distribution is much narrower, but it also seems that software salaries are on the lower end, which is the most surprising part to me. Or, as a German colleague of mine put it, "my no-good brother who takes construction jobs every now and then earns more than me in this software job", followed by revealing that apparently his wife still has to work for them to have the ends meet, because programmer's salary is not enough.
The average full time salary in Berlin is 40-50k before taxes. The median income of all Berliners is a lot lower than that, because we have many part timers and many people on social security. The programmers that I know get about 70k on average. Rent in Berlin is about 10€/m^2 (heating included), so 700€/month gets you an apartment for two.
I assume that the brother from your anecdote doesn't declare all his income (you are left with about 60% of your paycheck after taxes and mandatory insurances). I don't see how a programmer salary isn't enough for two people to make ends meet.
You know what else you will not find in Germany? Successful software companies. There’s basically SAP (which is a multinational that hides its revenues abroad) and hardly anything else. Hmm, I wonder why that is.
Define successful. I know of one German software company that's raking in money and large contracts, despite being staffed with underpaid junior developers and overpaid clueless managers. I had this eye-opening moment, after which I asked my boss, how is it possible that we have the expertise and yet they have the money...