Do you mean males get paid more for the same job in the same company? Pretty sure there are laws against that.
Look at the armed forces & police, men and women get paid the same but women don't have to reach the same standards as men and they're exempt from serving in the infantry yet they get paid the same.
Yes and I don't believe there are HR can give you a load a crap about yor background experience time with the company etc no one in my role gets equal pay I know for a fact me and another female in the same role are two of the lowest paid. I did get a nice bump on Friday but still not where I want to be in terms of pay. I do like the company I work for as well as the role I am in so I'm not complaining as much as saying it be nice.