There's a reason scammers rely heavily on things like gift cards, it's because hiring mules is expensive and creates a trail police can follow back to the scammers. It requires them to be in the same locale as the person they are scamming. Mailing cash is also pretty dicey for the scammers because you have to send the mail to a valid address. That becomes something police can trace.
If you wanted to completely eliminate scams then yeah, you'd also outlaw cash.
High schools should teach how to spot a scam. As others have observed, this is not a new one, it's just gotten more high-tech and convincing. This is one of many practical things our schools should teach about that they just don't.
That's the primary reason why so many scammers target old people. It's less to do with education and more to do with the fact that as people age they become naturally more trusting.
Difficulty in setting up a money transfer is not a hindrance. I have heard stories of scammers walking someone through the entire process to getting a mortgage on a house on the A&E Intervention episode of Greg. If they think you have money and they think you are gullible, they will devote time and effort to getting it.
These scumbags send grandma to a Bitcoin ATM.
A while ago, some police department simply seized them and the cash inside and reimbursed victims with the proceeds thereof.
https://www.youtube.com/watch?v=6A4uKSvFU40
Kitboga is a dang hero.