So when people talk about the marginal utility of donating a dollar to the SIAI, an equally valid way to phrase it might be “the marginal utility of increasing the salary of someone who earned $180,000 in 2009 by 28 cents”.
Assuming marginal money is allocated proportional to existing spending, which is surely not the case. (Yes, the $180,000 figure would be unreasonable if true.)
Assuming marginal money is allocated proportional to existing spending, which is surely not the case. (Yes, the $180,000 figure would be unreasonable if true.)