Why does the US still even have the Death penalty?
It's all about revenge. The american people are thirsty for blood. It's a dark truth that watching people die can be very satisfying, once you've been relieved from the burden of conscience.
That is only partly correct. GEMA indeed owns music written by their members. If you beome a member, you basially sign away all rights of all music you have written in the past and will ever write in the future to them. You literally no longer own your own compositions.
As a return, you get paid according to a convoluted fixed tariff system that heavily favours top-40 producers, deducts up to 80% of fees, gets paid out with up to two years of delay - and the exclusivity of the deal leads to absurd situation like artists having to pay for your own concerts.
In addition to that, GEMA also acts as a collection agency for foreign copyright organisations who have granted GEMA collection rights through IFPI.