Do people here believe the Laffer curve actually applies in real world whereby after you increase tax rates above a certain point you lose more revenue than gain. And if so at what rate do you believe the peak is around. I believe the peak is around 45%, but it depends a lot on elasticity of income, ability to move elsewhere so in some jurisdictions it is higher, others it is lower.
Yes, it exists and it's a real thing, and there's not always a defineable peak because a lot of it comes from different factors. For instance, economic growth caused by returning money to the hands of private investors vs being able to raise more money just from "natural" taxation.