A company I worked for required everybody to attend anti-corruption sessions (and later made it part of the induction process). A fun fact is that a reliable indicator of corrupt behaviour is never taking time off. If you're cooking books you don't want to let anybody else looking at them.

Huh, that's interesting and wouldn't have occurred to me. Even without that, there's value in testing the "bus factor" of critical roles. So, Jane wants to go on vacation and everyone's panicking because work can't get done without her around? It's much better to find that out now than when Jane switches jobs.

This is probably why the UK banking industry requires everyone to have at least one unbroken 2-week vacation every year.

Nice, this seems like the best way to do it. Fight workaholism, threatens the long term success of the business.

The problem is without other changes you likely incentivize people to take "PTO" but still work.

I've made it a personal goal to lead by example on this.

Coworker: I'll be out of office for my friend's wedding next week, but I'll check in sometimes to make sure everything's OK.

Me: Oh no you won't! Go have fun and stay away. We'll be fine for a few days.

Chalk it up to enlightened self interest if you want. When it's my turn to be on vacation, I don't want to feel obligated to check in. Therefore, I don't let the people who report to me do it, either.