Allowing insider trading would also incentivize leaders to make business decisions that primarily serve their personal interests, rather than their company's. They would prioritize decisions that create short-term changes in the company’s stock price, just so they can profit from trading on that information.
The fact that the most successful investors have the largest effect on the price is exactly what makes the market fair. A layman can login to manage their 401k, put in a market order, and know they are getting a fair price because many people, much more knowledgeable than the layman, are competing to set the price.
But either way, the same effect occurs. The sharks in the stock market profit from making good trades and in order to account for that the market makers have to quote a wider spread in the book, which effectively means the retail trader pays a larger spread. The net effect is money transfer from the retail trader to the smart trader. Would it be better for the market maker to just refuse to trade with the smart trader and then give the retail investor a better spread? Welcome to payment for order flow. Could a smart investor pretend to be a retail trader and get some good trades through Robinhood? Maybe, that's pretty analagous to what these guys are doing.
These are different mechanisms for the same thing but I'm not certain one is clearly morally superior.
A: Can you hear me?
B: Yes
A: What time is it?
B: 5 o'clock
A: Thank you, goodbye!
B: Goobye!
Nothing is lost compared to:
A: Can you hear me?
B: Yes
A: Yes
A: What time is it?
[...]
A: Can you hear me? B: Yes B: What time is it? A: ...
At the point that B has replied Yes, B knows that it can hear A and that it can send to A but it doesn't know that A can hear B. As long as A makes the first move in the rest of the conversation that's fine - the next message from A confirms that B's "Yes" was received, but if A has nothing to say then B has to send it's next query and hope that A received the Yes successfully. If it didn't then B thinks the connection is established but it actually hasn't been.
Airbnb just forked hotels, Stripe just forked Visa.
Dead Comment
But most importantly: whatever we do in this space has to be made on the assumption that we can't really influence what "bad actors" do. Yes being responsible means leaving money on the table. So money has to be left on the table, for - erm - less responsible nations to pick up. That's just a fact.
It's obviously not perfect, but could help and doesn't have the enormous side effects of trying to lock down all image generation.
I'll totally buy that he thinks about risk differently than other people, but not in some more mathematical sense.
My guess would be anything above what the customers get may well go out to government fines rather than returning to the equity holders.