I sincerely hate to be the bearer of bad news, but we are in the very early innings of a major global economic recession. If you like your job, I strongly suggest putting in an honest effort and work week. This past 5 years in particular have been incredibly cushy for employees, and that is about to change rapidly. I highly doubt many (if any) companies will employ a 4 day work week in a year or so.

I could also be wrong here and the correction won't be this harsh, but just throwing out a different perspective I don't feel is being shared across Hacker News enough yet.