your reasoning why you think boomers had unlimited vacation.
Strong domestic labor unions were able to establish contractual standards that became the national hiring benchmark. And the US was forced to compete with the USSR for international talent.
I never heard of anyone having unlimited vacation time until the mid 2010s. And then, those so-called unlimited vacations aren’t really unlimited. They are just a way to get accrued time off the books.
By unlimited vacation, they mean unlimited vacation banking. Like no use it or lose it policies or a cap on accrual.