Rich people don’t carry money. JD Rockefeller wass an exception. He always carried dimes. Of course, a dime was in his time worth more than a dollar today.
I guess is just sounds better to say: "Her Royal Highness does not need to carry 'money'."
I heard the FDR paid his poker debts by check. Not many people cashed them in because they wanted to keep the check as proof they played poker with FDR