A maximum pricing policy. This is more theoretical as it would be very interventionist in a market and is likely not to happen because of the resulting disinvestment. So stopping them passing on cost is just something that will never happen in the economy because they seek to regain profits. So the questions should be "How do you reduce the effect of taxes on the rich in the macroeconomy?" and "Do you think the positive effects of taxation outweigh the negative effects?".So you can reduce the effects of implementing a tax on the rich by messing with the price elasticity of demand in the economy, for when you raise taxes, the supply curve shifts up. This means if demand is generally inelastic, the price rise will be much greater than if demand was elastic. A little homework would be to look up incidence of tax diagrams to see how this mechanism works. Therefore, to apply this microeconomic logic to the macroeconomy, you would have to look at the aggregated effect of this in all of the markets in the economy, if all other things being equal, you find a rise in taxes would lead to a proportionally bigger rise in inflation, then it would mean the tax is being passed on to consumers more than it is not, meaning morally taxes on rich should fall. Alternatively, if you found a rise in taxes would lead to an equal or proportionally smaller rise in inflation then taxes should remain the same or rise respectively. So to minimize the resulting inflation, obviously you reduce taxes to £0, however, you have to consider the effect from multiple factors: the budget deficit, inflation and welfare loss of consumers. This is because this is an economic question that will have different views as people will evaluate their justification differently. For instance "I think the UK needs inflation to reach the MPC's target of 2.0% at the moment, and tax revenue needs to rise to reduce the government deficit, and the welfare loss to consumers is a price worth paying for these two positives" (Very short conclusion but this reply is getting long). So I would conclude taxes are justified, because the effect of taxes is generally positive.