The math is simple: many people do less than they should.
They might be selfish, but it’s likely that they’re struggling with a lack of resources or a story of insufficiency. Either way, in any community or organization, many people contribute less than their peers.
Whether it’s splitting a check, getting a project done or making an impact on the culture or a cause, if you want things to get better, the only way is to be prepared to do more than your fair share.
Because we need to make up for the folks who don’t.