So, this person is saying that the Fed has been so politicized that it's going to start ping-ponging across the aisle and that our own financial policy will become so unstable that the US dollar won't be a safe bet. I can see it.
That means the American institution that is left in control of the dollar’s fate by keeping spending (and thus the debt) under control is…. Congress.
This irritates me. That is their job. The Fed is supposed to be an "oh shit" backup. Congress exists to spend into our economy.