I just remind this topic with an interesting tax system suggested by @Emos few months ago: a part of gold income of every member is directly given to the guild tasks.
@Sirrian did a divine intervention (here) to involve guild ranks (the ones with the Promotion system that are currently useless 
).
And another point: it’s currently horrible to contribute. I just began to give 500k golds in one time and:
- you have to click several times to do one task, why?
- it takes some times when the task is complete… 10-20s but it seems so loooong.
I am sure that this point was already discussed but I don’t remember where
.
Once again, I hope that we will have some news about the patch 2.1 contents before any previews: guilds are too much important to do something wrong…