I think this is a worthwhile debate that often suffers from a lack of nuance. Is £86k a year a lot of money? For most people of course it is.
But it is also demonstrably true that being an MP attracts the kinds of people for who generating an income is not a big concern. Those being people who already have disproportionately high wealth and social station and crave power and prestige. You only have to look at parliament’s make up to see that. Believe Johnson when he says it’s chicken feed because it is to these people.
Unless they already have that wealth, it is simply not worth it for the best and brightest in this country to be an MP. Will the people who have the competence and capability to be leading lawyers, doctors, scientists etc. give up that opportunity for £86k with a decent chance you’ll be jobless every 5 years?
Absolutely not a hope in hell. I wouldn’t even consider it for a second and I’m decidedly not one of those people.
Empirically speaking, if you want more landed gentry types, decrease the MP salary - because you’ll get them in droves. If you want more diverse candidates, you need to increase it to make it a realistic option for a broader audience.
Understandably people inherently don’t like or agree with this because they like to think people become an MP out of some moral sacrifice, but unfortunately that just isn’t how it pans out in practice.