Some members of the ruling class prefer to present themselves as 'normal' people who are 'just like you'. For example, by not wearing a tie and by inviting you

Some members of the ruling class prefer to present themselves as 'normal' people who are 'just like you'. For example, by not wearing a tie and by inviting you to use a chummy nickname for them, they hope you'll overlook the fact they're the grandson of a baronet and went to Eton. Presumably jleyank thinks the same might boost the popularity of the royals. Personally I'm not so sure - the level of ostentation surrounding the royals is so ridiculously over-the-top that you can't possibly take it seriously. Scale it back carelessly and it might start looking sincere, and that's the last thing we want.