> I'm sure trillion dollar companies can pay for the best knowledge on union busting.
Indeed, Amazon have used the Pinkerton detective agency [1] against their employees to root out union activity. For those unfamiliar, the Pinkertons have existed in the US since the 1850s, with a history fraught with violence and questionable ethics, famously the Homestead strike of 1892 [2].
[1] https://www.businessinsider.com/amazon-pinkerton-spies-worke...