That is the exact issue. My prior employer had a $100K+ range in the payband that I was in. My current company's band is significantly more reasonable, but it is still a large range.My company in NJ has started to list salary ranges. It's about $60k range.
Although this legislation has some good intentions and is a step in the right direction, I don't think it will always have the full intended impact. Employers will often offer midpoint to an external candidate or find a way to offer above the posted range to a very senior level applicant.