> Almost by definition, if you're doing a Postdoc in a STEM field, you're probably qualified for a relatively well-paying job in industry
Be careful: many people who are great postdocs are rather overqualified (and thus rather not suitable) for many jobs in industry.
Getting well-payed in industry requires in my opinion skills that are opposite to those that make you a great postdoc:
In industry you must not be a truth-seeker who can deeply absorb himself in problems. Being a truth-seeker makes you an insanely fit in the brutal office politics.
Also, while I do insist that in graduate school you actually learn a lot about leadership (in the sense of being able to push people to do great things), the abrasive and highly demanding leadership style in graduate school and academia is commonly very undesired in industry (but in my opinion not bad: a very particular kind of people (who will love graduate school) flourishes in such an environment).
That depends entirely on the company. Where I am, what you say is mostly nonsense. Postdocs usually end up being the people leading (head down focused design or management) new projects that are directly or indirectly related to their research.
It’s not exactly overqualification, more misqualification. If all you have to say for yourself is “I have completed 23rd grade, look at all these papers I wrote,” your skills and experience, no matter how deep, have diverged from the needs of almost any conceivable employer. I strongly encourage anybody thinking of doing a PhD to get a job in industry first, even if just for a year.