Swiss 3rd pillar for US citizens

[gaijin]

So far it has been my understanding that a US-American citizen living in Switzerland should not have a 3rd pillar since these assets are taxed in the US.
However, I have recently heard about a way to not get taxed. Assuming you are married and both are US citizens, you can pay into an IRA account. If your payments into the IRA accounts match the amount of your 3rd pillar account, your 3rd pillar is not taxed by the US.
Can anyone confirm or deny such hearsay?

 

[Baptiste Wicht]

I would also be interested in knowing this.

I know a few US citizens in Switzerland, and I have never heard of anyone using an IRA from Switzerland.

Even if these assets are taxed in the US, won't you still get the tax savings in Switzerland?