At least in tech, I think we're mostly there already, particularly if the applicant has some explanation for it (and even then it's getting rarer to ask about it). With the large amount of no-child/one-child families and waiting until mid 30s to start having kids, it's very common for people to have enough income/savings that they can take a few months or even a couple years off to travel the world or try a startup, or something else.
I'd be careful stating this, as the reason why this isn't happening might be as simple as "there aren't enough experienced tech workers to make such a demand". Considering tech recruitment is still willing to do many other things which aren't empirically proven or even have empirical evidence suggesting against the act, there is room for skepticism here.
