In reality, more members would make things appear better only in the short term. But like a pyramid scheme, sooner or later you are bound to have a situation like we have now, with more people on the retiree end than on the contribution end. This type of thing just is not viable in the long term. Just ask the auto workers. They are getting to the same point. Or you could look at Social Security, where the number of people paying in per retiree keeps going down. Pyramids only work as long as you have a very large pool of new members, and sooner or later, even if you signed up every driver in America, you would run out of new people to bring in on the ground floor.