Jan 14 (Reuters) - U.S. equity funds saw inflows of $2.2 billion in the week ended Wednesday, a period when Wall Street indexes hit record highs on optimism that President-elect Joe Biden will be able to push more economic stimulus through a Congress controlled by Democrats. U.S.-based taxable bond funds drew $9 billion, the fourth straight weekly inflow, while $5.9 billion flowed into money market funds, Lipper data showed on Thursday.