Yet, other than during the month or two pandemic panic-hoarding the shortages didn't happen in 2020, or even the first 3/4 of 2021. So what is new and different? Government-imposed vax mandates. If port handling is skillfully staffed the handling will be near full capacity of that staff. Throw in vax mandates and resisters walk. The result? Under-staffed handling has reduced capacity. The resisters could be blamed - DUpipo smarter than mal probably already have - but in the real world populated by real human being, LIEden & Krew started a fight they should have known was unwinnable, even with a Pyrrhic victory. And in many cases - teachers, nurses, port facilities people, police & fire - with heavily unionized groups.