And it's very weird to call Linklaters "a pretty pedestrian, non-sexy law firm doing boring routine corporate stuff". They're in the Magic Circle, which is the British legal equivalent of FAANG. Their new grad roles will be just as competitive as Google's, if not more so. That the work their grads will do will be more boring seems like a reason for them to pay more, not less (not to mention the difference in number of hours).
Are you sure you're not just falling into tech chauvinism here? According to LinkedIn https://www.linkedin.com/company/linklaters/people/ people who work for that firm largely went to Oxford, Cambridge, and LSE. All you're pointing out is that white shoe law firms that hire from the top-tier universities in the country pay their associates extremely well, even as they do work you consider boring and unsexy.
It's the same thing as a FAANG job: any rando can apply but they're gonna get screened out before the first stage.
Outside magic circle et al, salaries are lower and hours are more normal.
Also, before they become a grad but after university they spend 2 years doing what’s known as a “training contract” while they do their professional quals. and the pay is much lower during this time. Graduate in law is after this period.
So what kind of professions, and how many years of experience, get £1m+ bonuses (if you happen to know)? AFAIK the only example that I'm aware is traders and/or high-level investment bankers (Director+ level)...
In the UK it's the humanities students who run the show and get the real money.
As a concrete example - I think basic new grads at Linklaters, a pretty pedestrian, non-sexy law firm doing boring routine corporate stuff, not Google-style super-stars, get £83k https://www.legalcheek.com/2018/10/linklaters-bumps-junior-l.... That's an open application, not something targeted at particularly talented specific people.
I think that's more than even Google new-grad pay in London. Google! The highest of the high tier international tech companies. How does it compare to what you see engineer new-grads getting?