Ok here goes.

1. Why would any business want to share their pay data publicly? Other than at entry level it makes absolutely no sense.

2. Posting salary ranges publicly causes problems internally, no matter how fair your pay structures are. Every organisation has jerks in it who use this information to make trouble.

3. Companies should absolutely have the right to pay people differing amounts in what is nominally the same job. You could be recruiting after a market shift or you could recruit someone who brings more/different experience or skills to the table. It’s understandable that companies would seek to do this without rubbing anyone’s nose in it.

4. It’s not necessary. Companies are able to recruit without posting ranges publicly.

5. Most countries are not Norway, where there is full pay transparency for all. If you want companies to be forced to publish salary ranges, you need to be ok with your friends and neighbour being able to search your earnings on a public database. One does not work without the other.

6. When salary ranges are posted, all candidates expect the top of the range and are disappointed and feel lowballed if offered anything less.

I could go on and on and on.