It's naive to think that wealthy people are better at the marshmallow test than the rest of us. The inaction of climate change and their glee at inflicting economic harm for short term gain proves otherwise.
Marshmallow Test:
Child who can't wait and eats both: poor impulse control
Child who waits: Better impulse control
Child who finds the whole bag under the table and stuffs them in their mouth, gets sick: future billionaire