[ZenGum]

Brilliant!


Here's another variation:
If you press the button, there is a 50% chance that you will get very large amount of money, and someone randomly chosen will die, but also a 50% chance that you will die and someone randomly chosen will receive the money.

This is inspired by Rawls' social philosophy, in that an arrangement is "fair" only if you would agree to be a party to it without knowing what role in that arrangement you will play.