This is my first post since the Saints Forever days, but I feel inspired to reply (and I think Spain might just see this match out so I have some time).
I'm sure the description of David Moyes is fair, but this shows exactly why most British managers would be unsuitable for our structure. We don't want a manager to run the club from top to bottom, we want someone to coach the players and make a final decision on potential transfers.
Most British managers don't want to work in that structure unfortunately. David Moyes, for good or ill, would want to control scouting, transfers, the academy etc and would put Les out of a job.
Of course there are enlightened British managers happy to work in our structure as Nigel Adkins did, but there aren't many of them about.