As you say, Tags have all been creeping up in price on a steady stealthy increase.
Mind you; Tag are no different to any other “premium Swiss” make, as they all jostle for position in their self-belief and self-worth opinions and recession free bubbles.
And whilst no doubt Quartz seems expensive and crazy at £1k in isolation, it's all kind of relative when you look across all the many Swiss brands and movements with the never ending price increases. Quartz still finds its natural position as the base model introduction to Swiss watches, with standard ETA fare at the £2 -£5k mark and in-house without a roof limit it would seem.
So as long as the price differentials remain between the various movements, in line with the prices increases across the brand(s) they will all find their expected and “increasingly unnatural” price point in the hierarchy of watches.
Questionable that any of them; regardless of movement offer anything close to value for money really.