Earlier quoted context omitted.
What a weird take to defend tech salaries in Spain, I'd love to move but the very top salaries for my level cap around 80-90k EUR so it'd be quite a big drop even compared to the UK
As the other comment said, it is not a defense But be aware that the London salaries upper tail is wider, possibly brought up by the quant firms (which are a different kind of company than most are accustomed) levels.fyi gives 112kE as the median and 200kE/90% for London vs around 60kE for the median and 90kE/90% (pretax for both)
Glassdoor lists the average for SWEs for Madrid at 35k€ vs London at £66k (76k€) which even accounting for cost of living is quite a big difference