Voters in Switzerland this month enacted a law requiring shareholder approval of executive compensation at all publicly traded companies, adopting a policy already in effect in at least four other European Union nations. Should the United States follow suit? The 2010 Dodd-Frank financial-reform law included several measures aimed at corporate oversight, disclosure and responsibility, including a requirement that shareholders of public companies be afforded a nonbinding "advisory" vote on pay, bonuses and so-called