Correct. However, enough of us do to render your claim that Five Guys is "3x as expensive as any other chain" entirely factually incorrect. And the situation's basically the same in any UK city big enough to have a few Five Guys.

It isn't. I would try leaving London. Almost all the chains you have mentioned do not exist outside London.

It is. I do. If not chains by the same name, equivalent ones that are as or more expensive than Five Guys. E.g., Fat Hippo are in Birmingham, Cardiff, Durham, Edinburgh, Glasgow, Leeds, Liverpool, Nottingham... And of the chains I mentioned, GBK for example are all over the place, in about 15 different towns and cities. I know of a chain in Manchester, "Almost Famous", if they're any cheaper than Five Guys, it'll be by about 50p. And so on. Your claim that Five Guys is 3x any other burger chain is ridiculous.

I bet the person complaining about the price of burgers was in London or some other major city which has them though. And nicer burgers won’t be much cheaper outside of London (they simply might not exist in some places though)

How much do you even pay in the UK for a 5 guys hamburger? the previous comment had a complicated order. For reference, in southern california, the regular hamburger is $10.79 from five guys. A lot higher than in n out, a double double is less than $5, but probably $2-3 cheaper than what you'd pay at a low key sit down restaurant like a brewery or whatever.

The Walthamstow (North London) Five Guys is selling the regular hamburger right now for £8.65 which in dollars is $10.75.

Out of curiosity I just checked Detroit, MI, median income of 20k usd a year. Still about the same at $10.49. This is almost bewildering how the price is pegged to about $10.75 the world over, no matter the price of labor or rent or beef or getting it to the world over. Margins must be all over the place.

I suppose it's to prevent Burger Arbitrage

As a point of comparison (here in East Coast Australia) decent (mid-range) hamburgers are commonly around AUS$18-20.

According to xe.com, that's about US$12-13.30.