Slightly different, but similar vein. Back in the early 80s when I started work, accountancy practices used to do "investment advice" which at that time didn't require the same specialist exams and experience that IFAs and Chartered Financial Planners need to do today to give advice. We did all kinds of things in that practice, i.e. hire purchase/loans, insurance brokering, pensions, and mortgages, including endowments. Mostly for our clients, but also for randoms off the street as we had the typical "office frontage" as we were also agents for a building society!
From the (almost geriatric) old school senior partner was a no nonsense approach that we were providing a service and not money making (the money was made from providing accountancy services), and that the commissions we earned from insurance, building society, pensions, mortgages etc was basically to cover the costs of the "front office", i.e. receptionists, secretaries, etc.
He absolutely hammered home to us to do proper due diligence, keep meticulous records of correspondence, advice, recommendations, warnings, etc., and personally checked every single bit of "financial advice" work that we did. (In fact he meticulously checked all accountancy and tax work too! - he was a bit of an old school control freak). Basically every letter we sent had to be signed by him, and he even insisted on seeing letters sent out by the other partners! Like I say, control freak!
But when it came to the 90s, and the mis selling scandals started, particularly endowments, but also pensions, etc., it served them well. Lots of people who lost out due to poorly performing endowments or pension firm collapses tried to sue and claim compensation via the ambulance chasing "no win no fee" compensation claim firms. Not a single one won.
Unlike lots of other firms who were found to have mis-sold, this firm had kept their files, kept their correspondence, "know your client" due diligence, copies of engagement letters, risk warning letters etc., so the challenges and claims for compo were easy to fight back against. Unfortunately, many other firms either hadn't done the same level of due diligence or hadn't kept files from years (decades) earlier, so couldn't defend themselves and basically had to roll over and pay (or their insurers did).
I do find it quite annoying whenever someone suffers a financial and there's the usual clamour of people "advising" them to claim compensation for mis-selling, as if it's always got to be the adviser/salesman at fault. Often (if not normally) there's been no mis-selling, especially in more recent times, and it's more that the person has either chosen to forget the warnings they were given or didn't take the time to properly understand the risks they were taking - lots of people don't bother to read the warnings or choose to ignore them. A bit like people criticise insurance firms for not paying out when what they're claiming for was never covered in the first place!!