Taking the time to craft a well-formed message requires a degree of empathy. The golden rule suggests that we write messages in a way that dignifies the recipient. The Global Elite may lack these traits and sensibilities.
It's probably smart to wear a suit to a formal occasion but IMO it's quite silly to interpret casual emails as disrespectful. As long as the email respects your time with efficient communication, that should be enough, and will save everyone busywork in the long run.