Unfortunately, in most cases, there’s no real-world way to punish false accusation. The bar of proof for that sort of thing is, and should be, extraordinarily high. You pretty much have to have a confession.

Also, charging false accusers has a chilling effect on victims. Think how manipulative abusers are. “See what happened to that chick on the news? Go ahead, call the cops. You got nothin’ you dumb removed, 'cept maybe a future in a concrete and steel cage. Here’s the phone, I’ll dial for you.”