Is "high-grading" bad? That depends on what you really want!

IN THE article “Rocky road ahead for North American gold miners” in on January 7, 2016, it is reported that Canada’s Cipher Research group, reviewing the state of the gold mining sector in North America, said that there is “evidence that operations were being ‘high-graded’, which would only lead to trouble later”. AMC Consultants’ Brian Hall and Daniel Kahler respond.

The original story can be re-readhere.

This statement rings alarm bells, but perhaps not the ones most people expect. So what is “high-grading”, and what “trouble” can it lead to?