many are? I’ve worked for many large firms like Barclays, virgin, npower etc and used a variety of HM, steelseries, human scale, Sentinel, humanscale chairs. Go to any corporate auction or website that is reselling office furniture and these are the sort of brands you will see regularly, the cost of a £50 vs a £350 chair is immaterial and frankly shows your ignorance in this area because the cost of an employee going on sick with back issues caused by a terrible chair will number tens of thousands of pounds and corporate supply contracts don’t see them paying anywhere near consumer retail prices, so it’s not like they have to pay that much - They don’t even have to cost £1000, £500, even £300, economies of scale and corporate contracts mean they pay hardly anything compared to a consumer and get regular service contracts rather than buying new. The annualised cost of a task chair that will last 8-10+ years and mean they are covered from a health and safety perspective is piecemeal compared to risking it on a £50 “executive” pleather chair from a shop like staples. As I said you may get small businesses going that route and very few medium to large firms will be using consumer grade £50 chairs, would cost them a fortune in the long run buying and replacing individual chairs
secretlabs even runs their own brand in this space, neuchair or something, which is a very pale imitation of a quality task chair.