Mark Garnier MP says ill-feeling towards AIFA and the CII is "widespread" in the letters he receives from IFAs, who say the bodies either fail to represent or listen to their members.
Garnier, a vocal member of the influential House of Commons Treasury Select Committee (TSC), says he is prepared to haul AIFA back in front of MPs to answer allegations it is only interested in serving larger advice firms.
As one of the MPs pushing for more Parliamentary scrutiny of the RDR , the member for Wyre Forest says he receives hundreds of letters from IFAs unhappy with the industry's two biggest member organisations.
AIFA is a particular target for vitriol, he says, with many IFAs accusing it of neglecting the concerns of smaller practices.
He says: "There is a lot of ill-feeling towards AIFA and the CII in the letters I see. IFAs say AIFA is not representing the smaller IFA, just the larger firms.
"Well if the trade organisations aren't representing who they are supposed to, we need to get them back in again. I am keen for more evidence sessions."
The last time AIFA director Robert Sinclair attended a TSC evidence session on financial regulation in October, MPs rounded on advice sector representatives for failing to speak up when they believed the direction taken by regulators was wrong.
Some branded the RDR an over-budget "fiasco" with a string of unintended consequences, with others suggesting it needs a re-think before implementation.
AIFA policy director Andrew Strange warned ministers in November the RDR is likely to be seen as a failure because it does not meet the key standards of good regulation, including avoiding constant flux.
TSC members are currently collecting evidence on whether the RDR will achieve its stated outcomes, and whether the outcomes could be achieved in other, potentially better, ways.
The deadline for submissions is 12 noon on 17 January.
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