For years I was unable to understand the reasoning behind the claims that income inequality is a moral issue that only applies at the group level. Then it came to me like an epiphany—or more accurately, as a Groupon email.
According to Wikipedia, the Groupon works as an assurance contract: If a certain number of people sign up for an offer, then the deal becomes available to all; if the predetermined minimum is not met, no one gets the deal that day.
The popular argument for claiming that income inequality is a moral issue appears to rely on a similar idea: If a certain number of people agree to abide by a moral obligation, then the obligation is required by all; if the predetermined minimum is not met, no is required to meet the obligation.
In the case of income inequality, few people are willing to agree that it even compels a moral obligation, much less one they must abide by. So the income inequality moralists believe that force must be factored into the equation. The formulation then becomes: