It's true, risk-free cash earns very low returns today.
This is great for the banks that own the Fed. They get to borrow for 0% and lend to the rest of us at 4% or 5%
They don't own the Fed and they can't borrow at 0%. In fact, at the current 0.75% discount rate, they're only borrowing $6 million. That's million with an M.
You're concept of "risk-free" is laughable. The value of the federal reserve dollar will one day be calculated against its initial value at issue in decimals. Its value isn't even close to maintaining pace with inflation.
And by artificially manipulating interest rates, the banksters are stealing billions and billions from the savings of millions of hard working Americans.