Urban germany, so yes stuff is more expensive here. On the other hand I never see a doctor and live very efficiently. If I had any real expenses things would look differently.

I agree that in theory you don't need that much money. But you have to go the high road when estimating living expenses, people have bad luck, special requirements etc. So in practice everyone should have enough cash to fuck up a few times, even if they don't a lot of people would enjoy living longer simply because of less broke-stress. Some people can handle it, some people can't. I'd even go as far as saying that every person should have the funds to start a business.