I wondered about that, so I looked up the official stats on the House of Commons constituency database.Norwich is a much wealthier city than Swansea. Large Science Park as well as providing services for much of East Anglia.
Swansea West is indeed more deprived than either Norwich North or Norwich South by some way. The average unemployment rate in Swansea West is 4.8%, compared to 3.4% and 3.9% in the two Norwich constituencies respectively, and the average weekly wage is £613 (v £673/£651).
However, I was surprised to discover that both Neath & Swansea East and Gower constituencies have lower unemployment rates and higher weekly wages than either of the Norwich seats.
If you average the unemployment and weekly wage rates for the three Swansea seats and the two Norwich seats you get:
Swansea unemployment 3.3% Swansea average weekly wage £680
Norwich unemployment 3.65% Norwich average weekly wage £662
If you take out Gower on the grounds that it is not representative of Swansea as a whole, you still get:
Swansea unemployment 3.85% Swansea average weekly wage £660
Norwich unemployment 3.65% Norwich average weekly wage £662
So not a lot in it, really. Presumably some people would argue that Carrow Road attracts a fair number of supporters from more affluent outlying villages, but on that basis we should add back in the stats for Gower. I visit Norwich quite often, and I can assure you that a lot of their supporters come from the city itself, and that people shouldn't be misled by the Golden Triangle - there are some really deprived parts of the city.
Not that deprivation is necessarily an indicator of football support. There are five constituencies in Liverpool proper; two of them are amongst the five most deprived constituencies in England, and nearby Knowsley is also in that list. If you've been to Anfield you'll know that their supporters are not all coming in from Hightown.
Swansea has a population of 250,000, Norwich 150,000. They used to get similar gates to what we are getting now, they turned that around. I ask again - how did they do it and what can we learn from their success?