Maybe now the FSA will sit up and take notice of the Treasury Select Committee (TSC)...
Ever since MPs started taking serious notice of the Retail Distribution Review (RDR) about one year ago, there has been plenty of gentle sparring over the issue.
During last year's RDR debates at Westminster, Mark Hoban almost nonchalantly dismissed the concerns of a number of MPs, while the early TSC sessions showed the FSA, and Hector Sants, in usual bullish form.
Meanwhile, several backbench MPs who had clearly listened to the concerns of IFAs and constituents, showed glimpses of despair and annoyance. But, generally, things remained civil.
However, today's letter from TSC chairman Andrew Tyrie to FSA chief executive Hector Sants has changed everything.
In his very brief letter, Tyrie expressed concerns about the speed with which the FSA dismissed his Committee's recommendations, which included a one-year delay to RDR.
Tyrie has received plenty of plaudits for his chairmanship of the TSC, particularly at a time when it is having to monitor so many reforms across the financial services sector.
He has always come across as a man who thinks carefully before speaking - perhaps a rarity in Parliament - and actually listens to people who come before him rather than trying to grandstand and score political points.
So the use of phrases such as "we deprecate the [FSA's] actions" and "this is unacceptable" really demonstrated his mood.
These are the words of an angry man, deeply disappointed with his perceived arrogance of the FSA and prepared to stand up for his fellow MPs, who clearly put in plenty of hard work to consider and report on the RDR.
The FSA's response was not exactly a shock, but its speed - coming into the newsroom at IFAonline just hours after the TSC report hit our desks (and several hours more before we could make it public) - was certainly a surprise.
Replying to Tyrie's letter today, Sants said the FSA is still considering the recommendations and insisted he meant no harm by the FSA's quick initial response.
His justification was the need to maintain the "momentum" behind preparations for RDR.
However, if anyone ever questioned whether the MPs on the Committee still had the fire in their bellies, we now have the answer.
Tyrie has responded to the the cries of Howard Beale in the film Network and stuck his head out the window.
"I'm as mad as hell, and I'm not going to take this any more!"
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