"White House says Walmart, FedEx, UPS will move to 24/7 model to address supply chain bottlenecks"
These outfits have been 24/7 for decades. There are only so many trucks, planes, etc.
And how do you "supposedly" add a new shift when the problem is a lack of workers?
FriendAnon has been with UPS over 40 years, says they can crank it up for short periods, like Christmas rush, but maintenance starts falling behind.