Earlier quoted context omitted.
In the US, a combination of personal information is taken by most as proof that you are who you claim to be. If you know enough of someone else's information, you can steal money rather easily. We need a better identity solution, but it's what we have right now.
There is probably no way to make that work, without improving the security. Same thing with credit cards, is it so hard to ask for a PIN when trying to pay with them? Or use 2FA like in any internet banking? For what it's worth, here in Europe you could pretend to be someone else as well, if you have enough information, but what's the point when you can't touch their money?
You can spoof their identity, to instantly acquire material goods / lines of credit.
And, if you are extremely persistent, you can spoof identity documents and hack bank accounts.