Amazon is planning thousands of job cuts across its corporate workforce, and managers have been warned to prepare for an announcement this week, according to people familiar with the matter, an internal document, and internal messages seen by Business Insider. The move is expected to be announced on Tuesday, and will impact employees in the US, the UK, and Canada, according to recent internal messages sent to Amazon managers.A draft email that's due to go out to impacted employees noted that Amazon is elim ...