List of herieracy
May will disagree about your personal interpretation of this.However there in is a point to be made.A HR director categorizing job roles would love to make the system simplistic.However the remuneration and degree of skill is market related.The biggest fraud in my view is the role of the salesman.Missing from Grade I on your scale.
To sell a job to a salesman with more responsibility,the job role maybe changed to Business development manager.A sales man continues in this new title role having no understanding what business development is or has any business qualifications to do it.Really what has been done is renaming a sales roll to 'sales development' a grade 2 job on this scale.
Clearly to do business development you need high skill,qualifications, and judgement.