its not all income tax (which is around 33%) but if you add up all the other taxes its 53.5% https://i.nostr.build/L9dSWwf8BTDRUqFr60IO3d.png
The 37% includes federal, state and municipal taxes. If you add social security and compulsory health insurance you need to add another 10-15% on top. Gets close to your 50%.