I have one question which I need answered, especially since I’m teaching my macro class about taxation this week and next.  Where is there Biblical justification for progressive taxation?  Specifically, I’d like to know why two people should be treated differently by the tax code if one makes $100k and the other makes $300k, from a Biblical perspective.

Please do not bring the poor into this with your Biblical analysis; surely no one will argue that $100k is poor.  And I’m not talking about the one making three times as much will pay three times the taxes.   Rather I’m hypothetically asking only why the marginal tax rate on the 100,001th dollar should be taxed at a different rate than the 300,001th dollar.

So, ‘splain it to me!

EDIT Update:  Just to be clear, I believe progressive taxation at my hypothetical levels is not Biblical.  Your task is to try and convince me I’m wrong.