if we excessively simplify the problem is people acting in their own interest rather than that of the system. If you want to build something you do have to put building it first or else you are just dishonest.
imho if you want results you have to exclude people who are unwilling or unable to constructive contribute. The system must be such that those who expect others to organize everything don't become victims. perhaps just ask them if the thing is working with some kind of punishment and rollback logic.