The United Kingdom’s conservative government is considering implementing signif icant changes to the tax credits, with clear winners and losers. The reform may be one of the most controversial...

The United Kingdom’s conservative government is considering implementing signif icant changes to the tax credits, with clear winners and losers. The reform may be one of the most controversial policies of the government so far. Briefly explain why it may be politically difficult to eliminate tax preference for some groups in order to improve the efficiency of the tax system by reducing general tax rates.