What about the rest?
I'm astonished at the implication that three-quarters of public sector IT workers have "used the cloud". I've worked in a lots of private-sector IT departments, and I'm not aware that anybody "used the cloud".
But the article says that public-sector IT workers send things by post or courier instead of "using the cloud", so it sounds like it's just a silly name for email and ftp. If so, I can proudly claim to have been "using the cloud" for at least 20 years.