I am always leery of demands for legislation to enforce what is already becoming a social norm. You can't legislate morality, but you can use legislation a a bludgeon against people who haven't actually done anything wrong.
Any good economist can show that once corrections for tenure and hours worked are applied, the wage gap essentially vanishes. Where there is an actual disparity in wages, we need a decentralized dispute resolution mechanism, not more governmental power that will inevitably be corrupted by political cronyism.