This advice is also similar to what I tell undergrads who are about to step out into the workforce for "just a couple of years before going back for grad school

This advice is also similar to what I tell undergrads who are about to step out into the workforce for "just a couple of years before going back for grad school." A few people do it, but the vast majority will get used to the new salary, get married, and that pretty much ends it. I tell them that the experience, particularly at a google/MSFT/apple, is worth getting because you'll have a much more well-rounded perspective than those who come straight from undergrad. But no matter how frugally you lived while working, it's the strong spouse that is OK with a 10x pay cut (> $220k -> $22k, at least for me in the sciences).