Which choice best states the main idea of the text?

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Why do some people with high incomes vote for politicians supporting higher taxes on those with high incomes like themselves? Economists Benjamin Enke et al. propose that values are a luxury good: that is, the higher one's income, the more weight one has the liberty to assign to one's values when voting. Thus, Enke et al. suggest that although the behavior of high-income earners who advocate for higher taxes may seem counterintuitive, such people likely do so because they feel enabled by their economic security to take a stance they think is morally correct.

A group of economists asserts that people with relatively high incomes are consequently enabled to take certain considerations into account when voting.

According to a group of economists, politicians who support higher taxes on those with high incomes must convince a sufficient number of people with such incomes to vote against their material interest if the politicians are to be elected.

A team of economists finds that people who vote for higher taxes on those with high incomes are likely to think their moral values coincide with their material interests.

According to a team of economists, the higher a voter's income, the more likely that voter's values are to conflict with their material interests.