Reciprocity and beneficial selection operate over longer cycles in a larger society than they do in smaller social units like families. Some altruistic efforts will be wasted, but every system has corruption: families can contain all the love and care you can imagine and still end up with abuse of trust.

The more help you contribute to the world, the more likely others' altruism will be able to flourish as well. Sub-society-scale groups can spontaneously form when people witness acts of altruism. Fighting corruption is a good thing, and one of the ways you can do that is to show there can be a better way, so that some of the people who would otherwise learn cycles of cynicism make better choices.