I get the idea you are in the UK and I think that accounts for a significant difference. In the US, employers have very little legal or ethical obligation to their employees. Decades of pro-business lobbying have basically solidified our status as an exploitable resource that companies can use up and dispose of "at will". An employee lives and dies by their share of political capital. I could use my political capital to try to get home office equipment, but the $500 I might have been able to expense is really not worth it in comparison to other perks I might be able to "purchase" with my political capital instead. These asks need to be carefully considered. A team mate asked for an ergonomic chair and was denied. I have asked for far more valuable things and been allowed.