Basecamp.
According to the current status quo it is OK to discriminate remote workers, but that is not an inherent property of the system, just an implementation detail. People are pro/con whether they think they are benefiting from the current state of things.
Whether you work for Google from SF or Chicago makes no difference to the company as long as you are doing the same work. I'd argue that someone working for Google in the UK should also be paid the same.
Tax rates are very different in the UK and SF or Chicago. Level of social services provided to people is very different, nearly everything is different. I am not saying whether person should or should not be paid the same, but rather pointing out the fact that things are different between UK and SF/Chicago. Most of Google Engineers in the UK pay 40-45% income tax https://www.gov.uk/income-tax-rates
e: removed the fluff, see child post
You mean, you're from England. The other parts of the UK set their own taxes.
https://www.moneyadviceservice.org.uk/en/articles/scottish-i...
That's not the case. Scotland is the only constituent country of the UK where powers to set income tax have been devolved. Income tax in Wales and Northern Ireland is still controlled by Westminster.
I don't know a single compagny that pay the same wage worldwide.