How Much Money Should an SEO be Paid?

I know how much I should be paid, but how much should an agency seo, or an in-house seo be paid?

As a freelance my fee is dictated by the market, I set it too high and I get no takers, too low and I am swamped.

But what about those who work in organisations? It’s a difficult question for some to answer and I so rarely see it discussed in the seo blog world. Maybe because not everyone wants this information public.

Various factors are obviously involved like, experience, expertise, job availablity etc.

But what’s the starting pay for an seo and how much can you earn?

I’m interested in your thoughts.