Free will is sacred, and that cuts both ways
The Larger Consciousness System is described as the evolving system all of this is part of — huge but finite, and explicitly neither infinite nor perfect. It is on its own evolutionary journey, with the same job as everyone in it: lowering its entropy.
It is not God, and the material rules that out on purpose. No perfection, no omniscience. It also rules out the machinery people expect to come with it: no karma points are collected, no reprimands issued, no punishment given — the stated reason being that inducing fear would hardly help anyone get rid of fear.
And it will not step in. Free will is sacred, the glossary says, and if the larger system dislikes what you are doing it is not going to come in and override you. There is no supervision, no correction, and nothing arriving to sort it out.
That cuts both ways, and the second way is more useful. Campbell's line on other people follows from it directly: you cannot force anybody else to change, because it has to happen from the inside out. What you can do is give somebody a better environment to grow in — and then they have to do the growing.
Which is also the answer to why your own work is not selfish. We are all netted together, he says; clean up your own act and everyone near you has a slightly better environment to grow up in. That is the whole of the available leverage, and it turns out to be enough.