Nominative determinism and the price of beer - I am only asking

I have always ben suspicious of the deployment of the term 'nominative determinism'. For those who are uncertain as to the use of this description it is deployed where the user identifies the behaviour that might be expected of the bearer of a name. Thus a Mr Cooper might have something to do with a barrel. Or so it is said.

But the Daily Mail sent its reporter Harry Wallop to cover business enjoyed by Wetherspoons at its Ramsgate branch and, inevitably, Harry encountered the fact that beer, known amongst many as 'wallop', sold to a large heaving local market of consumers for £1.79 a pint. I think that this is quite astonishing given that a typical pint in London costs about £7. After all, I grant you that Wetherspoons have a well-informed buying department and can give massive volume orders to brewers but just how London's publicans can possibly find themselves entitled to sell at £7 is beyond me.

However, it is just a fact of life that expertise on the subject of beer is universally encountered. So please could somebody contact me to explain the staggering difference in beer prices as between Ramsgate and, say, Chelsea.