I disagree. I'm fine with overbooking because it makes travel more efficient, both environmentally and financially. However, the airlines should offer whatever

I disagree. I'm fine with overbooking because it makes travel more efficient, both environmentally and financially. However, the airlines should offer whatever it takes to fix overbooked flights. Some of the passengers will be glad to be 4 hours late when they are compensated with, say, 5000$. This will naturally lead to a proper balance of overbooking.