The parent comment is obviously cherry picking news and trying to push an agenda.
Uk investment: https://www.aboutamazon.co.uk/news/job-creation-and-investme...
Us investment: https://finance.yahoo.com/news/amazon-invest-50-billion-ai
The AI investment is largely earmarked for data centers. Low staff but expensive because the hardware is currently very expensive.
It's not equivalent in the least. They aren't expanding headcount by 20K, they're building more expensive AI tailored servers
The US investment link is broken, and most of the UK jobs are in "fullfillment", some of the least fullfilling jobs - piss bottles all round.