Just to add: a receiver of "Hartz IV" long-term unemployment in Germany can earn an income of 100 EUR/month tax-free, with an 80% marginal tax rate for the next

Just to add: a receiver of "Hartz IV" long-term unemployment in Germany can earn an income of 100 EUR/month tax-free, with an 80% marginal tax rate for the next iirc ~700 EUR, due to unemployment benefits going down accordingly (think as if that tax was automatically deducted from your benefits).