Last year an American company microchipped dozens of its workers. Of the 90 people who work at [Three Square Market] headquarters, 72 are now chipped. Two months ago, the company ... started chipping people with dementia. If someone wanders off and gets lost, police can scan the chip "and they will know all their medical information, what drugs they can and can't have, they'll know their identity." So far, Three Square Market has chipped 100 people, but plans to do 10,000. The company has just launched a mobile phone app that pairs the chip with the phone's GPS, enabling the implantee's location to be tracked. Last week, it started using it with people released from prison on probation. Some Chinese companies are using sensors in helmets and hats to scan workers' brainwaves. There are tech companies selling products that can ... monitor keystrokes and web usage, and even photograph [employees] using their computers' webcams. All this can be done remotely. Monitoring is built into many of the jobs that form the so-called "gig economy". It's not easy to object to the constant surveillance when you're desperate for work. What has surprised [Cass Business School professor Andr Spicer] is how willingly people in better-paid jobs have taken to it. Spicer has watched the shift away from "monitoring something like emails to monitoring people's bodies - the rise of bio-tracking basically. The monitoring of your vital signs, emotions, moods."