A few things to think about. What if a person's parents were the efficient ones? Grandparents? Not that I'm necessarily advocating for taxing inheritances away, just saying your argument could have unintended consequences since it seems to depend on having somehow "earned" wealth or continuing to be efficient with it, as heirs so often are not. A more robust argument would need to account for that. The fundamental attribution error is also a real thing. Bottom line it turns out we humans more often than not confuse "more efficient" (or also "less efficient", it goes both ways) for many things that in fact were largely determined by chance. It's also worth considering that often great wealth stemmed from over proportionate use of our national resources. I wouldn't diminish anything Bezos has done, but his wealth was built on use of our interstates, airspace, educational system, rule of law....all thousands of times more than you or I individually use those resources. Is it unreasonable to expect he contribute more back to the system that allowed him to achieve what he achieved. After all, if you'd parachuted him into Somalia at age 30 and restricted him to Africa there'd be no Amazon, he needs everything that existed in the US to build what he built. Finally, are the rich better off in Argentina or Paraguay or any other third world country with wealth extremes then they are in the parts of the world with a robust middle class? I'd argue not, and that the richer you are the more interested you should be in insuring that wealth inequality doesn't become too great....for purely selfish reasons.
I'll have what for me will be a very large tax bill this year. And I'm happy to pay it and consider myself one of the very last people who need a tax break of any kind.