Steve, that's a very good and important post.
I made a significant investment last year. In the process I spoke to a variety of fund managers.
It appears that often:
they are not giving independent advice
fees can be high
performance fees were based on very low targets, eg better than bank interest rates
funds were designed solely to exploit migrants
they give glitzy, compelling presentations with promises of huge returns. One suggested I could possibly double my money!
funds were not registered with ASIC
I also believe that migration agents in some cases get sizeable commissions for recommending fund managers.
Certainly, if you were going to invest in the U.K. you would take independent advice from a registered advisor.
Also, I believe the large scale failure you mention involved a company that went bust owing $325m, much of the money presumably stolen. You definitely won't get a visa if the fund gets nicked.
I concluded there was a hint of the Wild West when I looked into it. Caveat emptor!
Scott