Amazon’s 30,000 job cuts show even giants aren’t immune to today’s retail pressures: efficiency, automation, and consumer caution now define the new marketplace.(Photo by Phil Barker/Future Publishing via Getty Images)Future Publishing via Getty ImagesAs Amazon announces plans to cut up to 30,000 corporate roles globally, almost a tenth of its corporate workforce, it delivers a stark reminder that even scale offers no immunity in today’s economy.That moment matters far beyond Seattle. In Britain, where Amaz ...