Also bear in mind that in the US it is a rich person's game indeed to hold foreign currency. But in Latin America and especially Argentina USD is far more common in the common man's hand.
This jumps the rhetorical shark. Nobody said they’re unrelated. Just that the unrest is a response to the collapse. It would have occurred if the government seized dollars or not. The dollar seizure was a response to the collapse.
Temporary and permanent capital controls have a long history of peaceful implementation. Economic collapses do not.
You’re missing that the measures have been taken in other contexts without unrest, e.g. Iceland, Cyprus, FDR’a gold confiscation. If X always precedes Y, and Z sometimes does but sometimes doesn’t (and when it does, is twinned with X), and we witness X, Z and Y, X is the dominant explanation for Y.
-- Simon Kuznets
This is a contradiction. You said social unrest is caused by financial collapse. International finance in a globally integrated economy like Argentina then necessarily becomes a piece of the financial collapse that causes unrest.
> Due to FATCA Americans are pariahs in the global banking system
For grocery money, a second bank account is sufficient. For expropriation risk, opening an offshore account as an American is nontrivial, but far from pariah status. (For that experience, say you’re Russian.)