Malcolm Turnbull is coming under massive pressure from within to recast the superannuation changes he took to the election amid widespread anger and despair in Liberal ranks over his election campaign.

Insiders are convinced the superannuation changes contributed to the loss of so many Coalition seats and the prospect of a hung parliament.

"It's now more obvious than ever that changes have to be made," declared John Roskam, the executive director of the Institute of Public Affairs, who predicted early in the campaign that Mr Turnbull would soften the policy rather than suffer a backlash.