Esther George, Kansas City Fed President, says the Fed has to get rates higher to slow down demand. Glenn Hubbard, Columbia Business School Professor of Finance and Economics, says policy still has role to play. Mohamed El-Erian, Bloomberg Opinion Columnist & Queens' College Cambridge President, says the Fed can't blink after being asleep at the wheel. Savita Subramanian, BofA Securities Head of US Equity & Quantitative Strategy, says she is focused on the long-end of the curve and sees the US at the beginning of a real growth cycle.