I still have trouble to imagine that a billionaire Imperial Earl is just trucker.
http://elite-dangerous.wikia.com/wiki/Empire
"Society is strictly stratified, with people being able to move between strata (lower strata particularly) based on money, patronage and influence." I don't know, but to me, it looks like if I have the highest imperial rank and I am a billionaire, I am not a cog in the wheel anymore and should be able to take over systems in the name of the empire and stuff like that.
Do we have any info on just how wealthy is wealthy in spaaaaace? Billions are nice and everything but that's also the operating cost of a relatively small fleet of ships. I'd like to see the tag on a capship, for example. Imperial Senators can swing it but we don't know how wealthy they are in numbers afaik.