In the film The King's Speech, George VI says sarcastically to his father "we're not a family, we're a firm".
That quip is attributed to the script, not the man, but it makes sense -- without the genuine power that, say Henry VIII had, many of today's royals are merely operating a family business. And what’s the business? Theatre. The British royal family, it could be argued, is a theatre company, and a rich one at that.