Earlier quoted context omitted.
Because there's no such thing as a 'natural equilibrium' interest rate[1]. The base interest rate is an equilibrium, which regardless of monetary policy regime is influenced by something completely artificial (the quantity of base money in an economy) and lending activity. The Fed deciding to set the quantity of base money added to an economy 'no more ever' or 'x% per year' or 'in proportion to stocks of some shiny m…
I mean, if we didn't interfere with the buying/selling of treasuries, wouldn't that be equilibrium?
It's not like treasuries and dollar reserves a central bank put into circulation before a certain date are natural things emerging out of a market demand and the ones after they put into circulation after a certain date are "interference". There is a market for credit and a dependency of that market on artificial things called dollars the Fed conjured from thin air regardless, the only question is whether the Fed's policy on artificially created dollars is to continue to attempt to supply them in quantities necessary to maintain a stable economy or not.