Same as you dropped a bag full of money in the middle of the road by mistake and somebody picked it up
Cash is treated a little bit differently. But even with cash, in some states and some countries, you are
not automatically entitled to keep cash that you find. The law varies wildly from one jurisdiction to another. If you find a twenty dollar bill on the street, no one is going to say you can't keep it. But if you find a bag of money that has identifying information, in some contexts, and in some places, that is sufficient to prevent someone from keeping it.
Electronic transactions are different. ACH transfers can be reversed when there is an error, and that's what Schwab tried to do, but she had already moved the money out of the account.
The law is not on her side in this case.
If you lose your credit card, and someone finds it and starts using it to order stuff from Amazon, does the seller get to keep the money, and the guy who found your card gets to keep the merchandise? And you believe that those transactions should
not be reversed? And you have to pay the credit card bill because it's all your fault? You made a mistake and left your wallet in the back seat of a taxi? That's your mistake, your fault, you lost your electronic money, and you're out of luck? Is that how it works? You f**ked up, and there is no way to fix it?
That's not how the law works for electronic payments in the USA.
(BTW, A
taxi is something that is sort of kind of like an Uber or a Lyft, but more expensive, for people over 50 who don't have smartphones.)