One option would be to require all companies to publish employees salaries. Would this requirement be more or less onerous than other options?
One argument is that it hurts businesses - but if every business is required to do it, then it is an even playing field. Obviously that cannot happen in an international business setting - so would it put the countries that implement it at a disadvantage, or would the economic gains outweigh the decrease in competitiveness?
I don't want lawmakers or trade unions undermining my right to privacy under some manipulative power-play guise of "fairness". We are all free to make our salaries public, if we think it is in our best interest to do so, let's talk about and focus on that and not be so naive as to believe regulations will magically solve a cultural issue.