It should be law that men and women receive equal pay for similar lines of work. So many times, a woman does the very same work that men do, but they receive less compensation for it. That is why it should be protected by law that a woman receives equal pay for a similar job.
There should be a law that mandates that a man and woman should receive the same pay for the same line of work. As long as there's no loophole to find ways around the law (as many U.S. laws have been built to have) if a man and woman do the same work or are in the same industry, they should be paid the same amount of money. At the end of the day, that individual is working to achieve something for the company and their gender should not be advantageous or disadvantageous to their work.
One key reason why it should be similar is that a woman should not be given less pay because that woman may need the equal amount of money that a man makes in her line of work to support her children, her husband or her parents. Another key reason, which actually favors men, is that companies will not have the opportunity to not choose a man in a candidate interview over a woman knowing that they would have to pay more for the man if they hire him. Equality should exist so that these factors are not taken into account to find the right candidate for the company's workforce.
Women already DO receive equal pay for similar work. Legislators should stay out of private business altogether and let the free market adjust itself. As I've written in other posts; government regulations intended to help out one group usually has the opposite effect. The sexist wage gap is a myth.