
Every human action is a response to an incentive (or a matrix of incentives). If you can't explain another human's actions, that just means you're missing the incentive that they are attuned to. Dismissive pejoratives like "evil," "lazy" and "stupid" are cop-outs from understanding other ppl's incentives. There are certainly evil, lazy, and stupid people in this world. But even they are responding to incentives.