His income (as it would also be taxed for NI and income tax).
I'm sure you'd be able to get someone to work for £1.2m /year. Whether you'd be able to get someone as qualified is a different matter. Same reason premiership footballers can get this sort of payout.Yeah, I'm sure you'll never get anyone to work for £1.2m p.a..
Note that I am making no judgement whether he's worth it or not, I'm just saying this argument is invalid.