Ah yeah, all the many social wealth funds that are owned by people without names. Such a loss!
I've no idea what a K1 is. Presumably something from your country. If the tax system in your country is so broken it can't cope with humans, you should probably fix it.
You have a defined benefit pension? In the UK they've all gone contribution.
So my pension is owned by me. I can buy an annuity from that but there's no reason that can't be a service company owned by a person just like insurance.
(Also, any form of equity investing that isn't a tax nightmare. You'd have to love doing K1s.)