I was in management consulting (financial risk, hedging, etc.) for many years. During LTCM's implosion, I saw a memo at a very large international bank (to remain unnamed), which was an internal memo, about why the bank had been providing liquidity to certain hedge funds. This was a move that was considered bizarre and unnecessary by most senior management.
The gist of the memo was that they were approached by the Federal Reserve, who said that stability of the financial system was an important goal of theirs. If this bank (among many others) did not help out in this time of need, they would all have much bigger problems to worry about soon after.
This was the argument put forth by this memo (from the Chairman / CEO), who said that the US Federal Reserve was convincing on this issue.
So, it would seem (anecdotally, of course) that the Federal Reserve also has stability of the system as a goal, and will go to great lengths to prevent systemic crises.
My humble opinion is that preserving the currency's "store of value" aspect has long ago been discarded, and we have moved to a new phase of simply preventing disaster.