You are sitting on a trillion dollar marketing opportunity here.
The problem is that our culture does not strongly encourage consumerism during work hours. Beyond a couple of decorative trinkets on the cubible walls, people don't spend much on or at their workplace.
Capitalism teaches us we must fix that glitch.
The right solution is to create a culture of "office bling". You don't want to be the only person in your office without a gold throne, do you? Are you really writing on the whiteboard with a fucking Expo marker from Office Depot when you could show your worth by using the new $17,000 Montblanc Whiteboard Excelsior? Oh, you had a Starbucks latte on your break? Plebian. I had a flat white made with kopi luwak and gold flakes.
Why should we only burn cash distracting ourselves from our miserable home lives, when we could also burn cash distracting ourselves from our miserable work lives too?
Yeah, several of my friends “indirectly contribute” with their extra free time by smoking pot and watching youtube and Netflix. They don’t really consume less ecologically either since they drive around more with their free time. This is not something I see paying off as a societal investment.
It's a prisoner's dilemma situation though, as others point out. Some people are going to insist on wasting their new extra free time at another job. The solution would be to put a hard cap on labor hours per person, mandating an overtime pay requirement that follows the worker from job to job.