True.

Relevant Barry's Economics video that goes into a bit more detail on this idea:

https://m.youtube.com/watch?v=b1vFgUi4frU

Relevant citations for those that prefer reading:

##Power and Brain Function:

• Obhi, S. S., Hogeveen, J., & Pascual-Leone, A. (2011). "Resonating with others: The effects of self-construal type on motor cortical output." Journal of Cognitive Neuroscience, 23(9), 2668-2674.
• Hogeveen, J., Inzlicht, M., & Obhi, S. S. (2014). "Power changes how the brain responds to others." Journal of Experimental Psychology: General, 143(2), 755-762.

##Wealth and Empathy Research:

• Piff, P. K., Stancato, D. M., Côté, S., Mendoza-Denton, R., & Keltner, D. (2012). "Higher social class predicts increased unethical behavior." Proceedings of the National Academy of Sciences, 109(11), 4086-4091.
• Piff, P. K., Kraus, M. W., Côté, S., Cheng, B. H., & Keltner, D. (2010). "Having less, giving more: The influence of social class on prosocial behavior." Journal of Personality and Social Psychology, 99(5), 771-784.
• Stellar, J. E., Manzo, V. M., Kraus, M. W., & Keltner, D. (2012). "Class and compassion: Socioeconomic factors predict responses to suffering." Emotion, 12(3), 449-459.

##Social Class and Moral Beliefs:

• Kraus, M. W., Piff, P. K., & Keltner, D. (2011). "Social class as culture: The convergence of resources and rank in the social realm." Current Directions in Psychological Science, 20(4), 246-250.
• Kraus, M. W., & Keltner, D. (2013). "Social class rank, essentialism, and punitive judgment." Journal of Personality and Social Psychology, 105(2), 247-261.

##Isolation and Psychological Effects:

• Cacioppo, J. T., & Hawkley, L. C. (2009). "Perceived social isolation and cognition." Trends in Cognitive Sciences, 13(10), 447-454. Smith, P. K., & Trope, Y. (2006). "You focus on the forest when you're in charge of the trees: Power priming and abstract information processing." Journal of Personality and Social Psychology, 90(4), 578-596.