> those proxies are the sole source of truth, which makes gaming them more important than actually being productive.

Reminds me of a short story I read, which I can't find now. The gist of it was about this person reading a memo or something at work on their computer, and the person wasn't actually reading it, they were just scrolling down the page and occasionally scrolling back up to pretend to re-read paragraphs because they knew the monitoring software flags such behavior as a positive indicator that the reader has increased comprehension of the memo.