How would it be possible to identify them using those vague descriptions?
You can't.
It's like Allardyce's situation, it's chat and rumour and the age old 2+2=5 scenario. It's powerful because people love to think the worst of others. Speculation's great for newspaper sales and for governing bodies to avoid scrutiny.Unless and until an offence is identified then names shouldn't be uttered.
Allardyce is the fall guy, even though he appears to have done nothing illegal, he's being used in a sting. The implication is - stop what you're doing and shut up and this scrutiny will go away.
I'd be surprised if the FA had the balls to collect information about corruption and present to law.