Actually I think it has to do with a skilled profession where success is hard to predict and to attribute. Same is true with executives and lawyers. But still the person is critical to that success.
They should be paid more cause they need more monetary motivation to do their job better i.e. beating the market!
When Occupy Wall Street was still a thing, a buddy of mine and myself went there to represent a "union of market arbitrageurs". He was carrying a sign "correlation traders are good people" and I had a placard with "volatility is for everyone".
I'm thinking of applying since the pay is good. I will be honest and disclose I won't really like the job...but the pay is good so I will do it.
I think the contractors now are the most lucrative jobs. They have many orders every day and they are well paid. I had some problems with a gutter at my house and I called the guys from https://www.contractorstoday.com and they've done their work very quickly. I had a 2-minute dialogue with a contractor and I understood that they have a really good salary. But I have to recognize, that their work is not easy and not everyone will resist.