I would prefer license like GFDL for everythink, but for pictures where a right owner (e.g. institutes) has a higher commercial interrest Creative Commons licenses without the right for commercial use could be a working compromise for both interrests.
I think you have misunderstood the purpose of Wikipedia. It is supposed to be a free encyclopedia. This is not a loosely formulated "interest", it is a specific mission with a commitment to specific ethical criteria.
Because I have doubts about the Creative Commons licenses we should go on with Richards idea of "free use for educational purpose"
No such idea came from me! On the contrary, I explained why this would be a bad mistake. If Wikipedia did this, it would not be a free encyclopedia any more.
I am sure you mean well with these proposals, but proposing for Wikipedia to throw away its mission and its commitments is not the way to be helpful.