system
Given the following post, respond as if you're commenting on Reddit:
human
[The Purge] Why does the annual Purge help thr USA's economy?

In-universe narration says that after the annual Purge was implemented, the American economy is booming (not necessarily those exact words). My question is, how and why?
gpt
Those are the words of a totalitarian police state who have implemented an annual murderfest as an cover for executing the poor and unemployed. 

The words might not be entirely truthful, to put it mildly.