The Solidarity Solution Principles for a Fair Income Distribution

After critiquing existing answers, Olson invokes the idea of mutual justifiability: when someone claims that her situation should be improved at someone else's expense, she must be able to give a reason that cannot be reasonably rejected by a free and equal individual who regards everyone else as the same. To give the answer bite, Olson distinguishes two types of envy. Reasons based on personal envy can be reasonably rejected; reasons based on impersonal envy cannot.
Olson then tests the solidarity solution against the theories of Ronald Dworkin, Philippe Van Parijs, and Marc Fleurbaey and applies it directly to the concrete issues of the gender wage gap and taxation. By providing a new approach to problems of fair resource allocation, The Solidarity Solution establishes philosophical discussion as critical to today's fight to end economic injustice.