Education in academic economics is negatively correlated with common sense.
Here's a hedge fund manager, Andrew Lahde, who bet against the subprime US lending market before the crash of '07 and won big, on the topic of higher education in business and economics:
"The low-hanging fruit, i.e. idiots whose parents paid for prep school, Yale and then the Harvard MBA, was there for the taking... All of this behaviour supporting the aristocracy only ended up making it easier for me to find people stupid enough to take the other side of my trades. God bless America."
The benefit of keeping a few competent economists around is that they can help you avoid being in thrall to defunct and discredited economic policy of the past. But never take them too seriously.
Remember Alan Greenspan's testimony, in public, to Congress, on the topic of the crash of 2007? This was a man with decades of real world experience in corporate America, decades of consulting on economic aspects of actual functioning corporations in national and international trade, then Chairman of the Federal Reserve for more decades - privy to it all, both the people and the money involved, and widely respected by many smart people everywhere;
but he had the disease, the flaw, the crippling infusion: a PhD in economics. And so there he was, overseer and enabler of the worst economic disaster since 1929, and he said this:
"Those of us who have looked to the self-interest of lending institutions to protect shareholder's equity – myself especially – are in a state of shocked disbelief..... I still do not fully understand why it happened - -
Let's be blunt: anyone who depends on moneylenders voluntarily foregoing personal gain from lending money, in protecting the interests of anyone other than themselves, is a fucking idiot.
And you don't come by that level of idiocy naturally - you have to take classes in economics.