As a founder this is something that I have been thinking about quite a lot. As you may know I initiated both the Nxt Foundation and Nxt Organization, so I am very positive to an organized body of dedicated members that help grow ecosystems. I consider a IOTA foundation inevitable (in fact it's part of what Wanxiang Labs Grant was about and one of the milestones), but the big question is whether the community wants to fund it or not.
When we started the crowdsale we decided that IOTA would be in the hands of the community, not in the hands of a few powerful entities. Due to this we decided not to allocate any portion of the iotas / keep 0% premine. This in primarily to ensure that the foundation and the community rely on each other in a balanced relationship, so no asymmetric power.