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Not only that, but in Germany many companies will not hire you, if you don't have a degree. So you must also spend a lot of time (3-5 years) and money to get a Bachelor/Master degree.

Money? What money? AFAIK degree programs in German public universities are nearly free.

In public universities yes, but not in private universities. You will also have other expenses as well when you study (rent an appartment, food etc.)

Don't do that then?

It is ridiculous if you associate pay with degree/profession, but it is not if you associate pay with the offer and demand equilibrium. If there are no revenues to be taken or no demands for a professional, there’s no reason to pay them more. Degree does mean someone deserves to make more.

Maybe. All i know is i would much rather be a computer programmer than a cleaner, even if being a cleaner paid more.

Depending on who you ask, income inequality and returns to education/skill are anywhere from closely related to the same fact.