That's the message coming from shareholders of some of the biggest banks in US which got government aid. Shareholders including fund managers, pension funds and other institutional investors have shared their fear that banks may be unnecessarily hurrying up in freeing federal oversight, especially with respect to compensation, by giving back capital that they might once again need later.

"What's important is getting their house in order, not paying the government back right now," said David Ellison, president and chief investment officer of FBR Equity Funds.

The business of big banks repaying the big bucks in haste could come at a cost to bank investments held by funds, which are taxpayers' most common avenue to investing, if the Treasury decides to turn a quick profit on behalf of taxpayers.

The statement comes at a time when there is news of US Treasury, which owns 7.7 billion shares of the Citi, supposedly considering winding its stake, which would translate into a $7.2 billion gain on its investment once the lock-up period ends on March 16th.

Besides, the repayment by big banks may force some investors asking when regional banks would do the same.