> Does a burger taste any worse if you know someone's having caviar?

Human beings have a fine-tuned sense of inequality and injustice; it's one of the things that makes us self-legislating agents, rather than beasts scrabbling for the top. The burger absolutely does taste worse if you know that it isn't a fair representation of the value of your labor.

To make this more salient: your argument would apply to people living under repressive regimes as much as it does to content Westerners sitting at home. Or do you think that North Koreans in China have no right to object, given that their equivalent domestic forced labor would be even worse?