We'd all be obviously better off with greater oversight and if CEOs were concerned about their story ending with "and then went to prison". Here's some examples why:
Valve stole from an estimated 20,000 Australians before a judge recognized their former refund policy as being designed to refuse refunds rather than disburse them. Under a system of accountability about 20,000 Australians and maybe several hundred thousand others around the world wouldn't have been stolen from by Valve, who got away with this massive fraud by paying a small fine they contested and changing their refund policy. GOG still enjoys a similarly disingenuous refund policy where you must help them prove the game can open on your computer which is the threshold they invented for denying refunds.
https://variety.com/2018/gaming/news/valve-australia-fine-12...
Google realized at some point that they had not coded up a particular kind of refund and let it sit for twenty years, stealing $75 million from their advertising customers persisting long after they knew. Under a system of accountability these companies wouldn't be being stolen from by Google, who got away with this massive fraud by refunding an amount they calculated.
https://www.businessinsider.com/google-emails-adtrader-lawsu...
Facebook realized at some point they could steal from children and started both optimizing for more confusing virtual currency purchases and refusing refunds on accounts they identified as children using parents' funds. Under a system of accountability exploiting these children and defrauding their parents wouldn't require a multi-year lawsuit to resolve with a small check.
https://www.revealnews.org/article/facebook-knowingly-duped-...
Then there's the mystery of who's still paying for AOL dialup. Across the internet zombie subscription fraud and free-trial fraud must be in the tens of billions a year, companies optimize around fraud so hard we have to call it dark patterns so they can disassociate from the criminality of what they are doing.