Do we need a new word to describe "rich"?

When this was recorded a pint of beer cost about 50p, now it's about £5. So a millionaire then was the same as someone with ten million today. In the 1940s, it was worth about ten times more still (one James Bond millionaire villain had a full sized railway on his ranch). It seems to me that that kind of wealth needs a new name, since a million pounds today will just about buy you a nice house in the suburbs, not a private island. Or maybe we just use it for people "earning" a million a year?

Do we need a new word to describe "rich"?
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