Bridgeit
Your Comment does not make sense ?
I'll have another go then....
The ongoing job opportunities afforded by our having a Royal Family are not enough in themselves to justify having a Royal Family. Whatever the "100s" of people are doing, there are other jobs they could do. Possibly a good number of the jobs are involved with looking after a well-off family and their many homes, and so those jobs would continue to exist. Moving to a republican system does not mean depriving individual people of the assets or lifestyle, it means we have a different form of government.
But the structure of job markets change. Some types of jobs will disappear, and others will replace them. I suspect that when bear baiting was made illegal, there were complaints about what the bear baiters would do for a living. Well, they had to find other employment, because it was decided that bear baiting was not something that this country wanted to support any more.
So anybody currently working for the RF will have to find other employment, if and when we change our systems of government.