I've spent 5 hours today marking. I agree all teachers need to look at the pupils work each day and see how they've got on and what their next steps are
Look at each pupil's work, yes, see how they are getting on, yes. Marking it? No. Creating detailed records of each day's work? No. You can look at each pupil's work and help them move on by just walking around the class and talking to the kids. In secondary you don't need to tell each kid individually what their next steps are, you can do that to the whole class.
The problem is that without the red pen in books, SLT would suspect that those conversations are not happening. It sounds like a lot of marking might just be to prove to other people that assessment and feedback are actually happening, not because written feedback is more valuable than immediate verbal feedback. That's just wasting time. Instead of outsourcing that, just stop doing it.
As for the OP, has the director of the think tank ever been a teacher? If not, then why do they feel qualified to spout off on this sort of thing? And if so, then why are they talking nonsense? Did they mark with their eyes closed? Did they learn nothing about the kids when marking their work? Did a personal knowledge of the kids not inform their marking? If they think that marking is so valueless to a teacher and a personal touch in marking so useless to a student that it can be shipped off to India, then I'm afraid I don't rate their opinions on education as worth listening to.
Certainly some aspects of marking don't require a teacher. I often read the answers out to homework in class, get the kids to do the ticks or crosses and write basic comments like 'use a ruler' or 'show your working', then I take it in and do the more important marking like figuring out why Jonny keeps getting the wrong answer, but I often get important feedback from the class and the class gets important feedback from me as we do the ticks and crosses. If that was sent abroad, valuable information would be lost.
The comment in the OP talks about 'how reliable' outsourced marking can be. Well reliability is all well and good, but marking is a two-way conversation between the teacher and student and if you introduce a third person who knows neither teacher nor student, then the conversation becomes less useful, regardless of the reliability of the marking.