Unions as investor representatives

Just a quickie about the idea someone ran past me recently. This is that a investment fund could be created that is affiliated with the labour movement. It could have union officers as trustees to make sure the thing is run cheaply and effectively, and pursue an ownership approach in line with the values of TIGMOO. The interesting bit of the idea is that it could also offer investors union membership if they don't have it already. I think the plan is that this would both be a way to new members and give the unions a bit of a role as investor representatives.

Any takers?