I am still puzzled by this economy

Mainly the excess reserves and low yields for Treasuries.  The economy is still growing at 2.5% (YoY) , typically, the bean counters say. So why are the big banks happy to pile on the excess reserves at a .25% (YoY) deposit rate? It seems like an economy where banks do not even operate, all growth is coming from retained earnings. Who is lending money to DC at .1% (YoY) when the world growth is still 2% or greater? This is not the Fed, this is the lending market operating these low rates. Either the bean counters are mis-counting growth, or the risk premium of off the charts.  Something is not right with this economy.