You prosecute the ad companies that are complicit and assist them in their endeavors. The scammer himself might be out of reach of US law enforcement, but Google which is promoting their scams (and getting paid for it) is definitely not.

That's easy. Those scams operate because the countries/players have access to the US financial system.

You provide the incentives to the countries to fix their problem by cutting them completely off. If someone using a bank in Cyprus did it, you tell Cyprus government that in 48 hours the Fed will block all transactions with that bank and you block it. They move to another bank, you repeat it. Eventually Cyprus government ( and Cyprus banks ) have to make a choice - continue to tolerate scammers using their banks and be locked out totally out of the US financial system or crack down on the scammers.

You're right. Dunno why you're getting downvoted.

Follow the money and report the issue to the institutions along the line. If they refuse to shut down the scammers and to stop facilitating their crimes, shut the institutions down for being an accessory.

You don't even need to be this severe. The credit card system demonstrates how things can work: make the bank post collateral and pay a small transaction fee per transfer. Refund any fraud victims out of the fees and/or by issuing charge backs onward to the bank. If they facilitate a lot of fraud, raise their fees. If they refuse to pay the fees, seize the collateral and cut them off.

Or, you know, punish the platform that allows for these scams to happen.

I find it funny in this case: If they operate from a bank in China then the Chinese gov. will block all tech exports to US until you unblock their bank.

While we are at it, let's also throw 2-3 nukes to the country in case they dont fix it.

Well, it wouldn't be nukes but if someone who outed US Gov wrongdoing was there, I'm sure the US could force down their aircraft or whatever.

Same with Robocallers... Also call them what they are. Call them terrorist and you block off the countries enabling these terrorist groups. Sanction them too

Hang on, how are robocallers terrorists?

There are different types of terrorism. It falls under the cyberterrorism and critical infrastructure category.

I still don't understand how robocallers are engaging in terrorism, or damaging critical infrastructure.

Don't get me wrong; I'd love to see them picking up trash on the side of the highway for next twenty years of their life, or worse. But calling everything "terrorism" really reminds me of the years following 2001.

Didn't Lenin say "The purpose of terrorism is to create terror?"

I don't know about you, but I'm scared anytime my phone rings that it is another robocaller.