Well, I personally think this movie blew right past tongue in cheek homage to Wrath of Khan and straight into juvenile, ham-fisted awkward rip off. In short, it was a visually impressive turd pile.

Would you mind trotting that joke out about 70 more times?

If an employee getting $10 an hour is worth $20 an hour to me as an employer, I'd rather pay the $15 up front (and pocket the $5) for an extra hour of work than lose $30 the next month when they take the 1.5 hours off (sure, I made the full $20 off their overtime hour of labor, but I'm at a net loss of $10 when they cost me $30 the next month - and more if I now have to hire another worker to cover people's comp time).  The reason it works so well for government employees is because so many of them aren't close to optimally productive, so nobody notices if you're gone an extra day here or there.

I'm all for flexibility for employees, but I wouldn't be shocked if workplaces that can easily define a worker's value based on output metrics (manufacturing, for instance) don't offer this.  I wouldn't be surprised if few employers offer it altogether.