I actually don’t disagree with the sentiment it’s just a somewhat weird target to attack. The KAF 748 is leased from Korean Air and was retrofitted to meet VIP transport requirements, including I’m sure office/meeting space, significant tech, lodging, and capacity for a certain size of delegation. There’s also security aspects and countermeasures to be sure.
A 787 would be more efficient on fuel burn, sure, but is a much smaller aircraft and would be less accommodating of their needs. Don’t forget they updated from a B744, so a template already existed. What would they sacrifice in a downsizing?
Better to target wasteful usage of jets by a handful of pax at a time, especially over short distances …
our very own government is guilty of that.