

Tech companies, as a general rule, do not filter the internet of their employees, because those employees generally need to do a lot of stuff with the internet (or networking besides the internet) and filtering it would cause a lot of problems.
Production machines (where the data lives) can be much more restricted than work machines. Strong access controls mean that compromising a work machine doesn’t give you access to production data.

It’s very popular to wail about how the UK is a police state. I guess it’s because the UK is culturally close to the USA, but different in some ways, so people become most aware of those differences, no matter how big they truly are. And Americans are very bad at comparing their own country to others, so an article about how many cameras there are in the UK or in London does not necessarily get such a comparison; it only decries the situation abroad.