The problem with this approach is that it's tricky to take credit for when you get your way because you've done it so quietly. You have to have an organization and leadership that is wise enough to recognize what you've done.
you get the agreement quietly, such that when you speak publicly there is a general agreement on the statements you make in the group. hence you do get credit.
also note that if you (need to) push an idea, you shouldn't be the only one pushing it.
You should prevent the idea becoming tied to you as person.
Some people will just disapprove the idea because of the fact that it comes from you (instead of judging it by its merits).
