re: Nikki Haley Says It’s Time to Raise the Retirement Age to Reflect on Life Expectancy

Yep. The Laffer curve shows how tax rates dynamically change revenue because of changes in behavior.

Raising taxes 50% wouldn’t give you a 50% increase in revenues unless taxes were low before and are returning to a somewhat normal rate.

Typically, rates are already high and attempts to raise them further just depress sales or make people avoid them.