That is one of the ways in which increasing a tax rate can reduce the total tax yield, thereby defeating the whole supposed object of the tax-raising exercise.

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Along the way, Joe the Plumber became political road-kill, his professional, political and tax status the object of withering scrutiny and criticism.

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For some on the right, who object even to the idea of a federal income tax, the mandate is an old fight reborn.

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Obama's targeted tax cuts will make the worthy goal of tax simplification an even more distant object.

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And as an immobile object, housing is one of the easiest assets for governments to tax.

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