Given that Prince Charles is planning on reducing the core of the royal family when he becomes king, have they jumped before they were pushed out?
Definitely not. Both Diana and Charles were very, very clear from childhood that they were moulding the brothers to be a unit so Harry and his future family could support William with the burden of Kingship. Charles has been clear in his reign it was intended he, Camilla, both his sons and their families would be the core royals.
They did both ensure Harry had his own quite considerable independent wealth too, via the Queen Mother, Earl Spencer and of course from Diana after her death. The aim of that was to try and stop Harry turning into another Princess Margaret or Prince Andrew with no real role and no means of support, hanging around with celebrities, ligging, living dissolute lifestyles and embarrassing the monarch in pursuit of cash.