Jeff Bezo’s incorporation of automation into online shopping has made Amazon the world leader in e-commerce by utilizing the technology of robots. His business acumen has also made him the richest man on earth, worth around $150 billion.

Now the holiday sales statistics are in, and the system is working well: there were more items ordered and shipped worldwide than ever before — with fewer human workers.

It has long been a talking point among businesses going big on automation that they were adding the machines to “help” human workers, not replace them. Of course it make no sense for a business to invest heavily in modern robotics just to make work easier for the humans — the long term plan is large scale replacement, such as has taken place in automotive manufacturing.

Below, humans have largely disappeared from some aspects of automotive manufacturing.

The jobs economy is booming now — thanks to Trump’s economic policies — but when machines become cheaper than human workers, replacement will happen. Amazon is a leading indicator of robotic trends, which we should watch closely.

Finally, it goes without saying that low-skilled immigrants are totally obsolete in the future automation economy.