Harry Truman increased the top federal tax rate to 92%. Why? To pay for the Korean War. The Korean war was paid for up front without borrowing ANY money. Its the only war in United States history where all the direct cost of the war were paid for immediately through tax increases. Sure, there were some rich people who complained, but most felt it their patriotic duty to pay that rate with the country at war. After all, few if any of the rich were fighting on the front lines in Korea risking possible death and dismemberment. Sure, paying 92% in taxes may be tough, but its certainly not as much of a sacrifice as being killed in combat or being severely injured in combat.