Pretty much...
....this.
Additionally:
1) Do you know the difference in pay and competence between HR Managers in your company and the NHS?
2) Being legally compliant means at the minimum making policy, keeping information up to date and dealing with complaints and incidents. so
3) How many doctors and nurses do you think you can additionally take on by removing one Grade 4 position when 2) above still needs to be done by someone?
This. The popular media frequently used to bemoan the amount of managers in the NHS and the mud stuck.
https://www.kingsfund.org.uk/projects/health-and-social-care-bill/mythbusters/nhs-managers