[rossdavidh]

Sure, I try to buy organic foods, I try to recycle, etc. But, if the incentives are aligned in the wrong way, then the overall trend of society will head the wrong way.

Which is, sure, not a reason to not try your best within the existing system. But exhortations will only get you so far. We tell people not to steal, but we also have police, burglar alarms, doors that lock, etc. because we know appeals to people's better nature is not enough.