The metaphor in the conservative model explaining why wealthy deserve lower taxes is the metaphor of Moral Self-Interest.
The conservative model for morality is adopted by conservatives. They support lower taxes for wealthy, less environmental regulations, opposite-sex marriages and work against abortions. There are many metaphors for modelling the morals.
In these metaphors, the metaphor which explains why wealthy deserve lower taxes is the metaphor of moral self-interest. It says that self- reliance is achieved through strong self-interest. In conservative model, being wealthy is being good. So here the metaphor of moral self-interest defines a model citizen as on who achieves the goal of self reliance by any means. This makes the rich and successful persons model citizens in a conservative point of view. Thus they deserve lower taxes.
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