@Foxfyre,
Actually, in the posted essay Medved is claiming that according to Leviticus, a progressive tax system cannot be justified, because it "constitutes the blurring of justice and charity", and that only a flat tax system is compatible with the bible. Quite obviously, it's Medved who is nitpicking Bible verses.
Fine with me. If you want to argue that a progressive tax system is incompatible with a 4,000 year old code for a tribal society, I have no problem with that.
And if you want to argue that the Golden Rule shouldn't be used to justify a progressive tax system, then I don't have a problem with that, either.
Just don't tell me that a half-sentence taken from some ancient text that lays down the rules on how to treat your slaves, stone adulterers and sacrifice two turtles or two young pigeons on the eighth day after your menstruation as compensation for being unclean should prevent modern society from fixing holes in the social safety net.