Oscar Wilde? Henry Wotton? Sibyl Vane? Louis T. Stanley? Apocryphal?

Question for Quote Investigator: The famous wit Oscar Wilde has received credit for the following cynical dialogue, but I am not sure where it appeared:
“Young people, nowadays, imagine that money is everything.”
“Yes, and when they grow older they know it.”
Oscar Wilde has also received credit for the following quotation which has a very similar meaning:
When I was young I used to think that money was the most important thing in life. Now that I am old, I know it is.
I have become skeptical of these attributions. Are either of these quotations authentic? Did Oscar Wilde repeat the same joke? Would you please explore this topic?
Reply from Quote Investigator: Oscar Wilde published the novel “The Picture of Dorian Gray” in 1891. During a scene in chapter three the jaded and hedonistic character Lord Wotton (Henry Wotton) met with his uncle Lord Fermor (George Fermor) and discussed money. Boldface added to excerpts by QI:1
“Money, I suppose,” said Lord Fermor, making a wry face. “Well, sit down and tell me all about it. Young people, nowadays, imagine that money is everything.”
“Yes,” murmured Lord Henry, settling his buttonhole in his coat; “and when they grow older they know it. But I don’t want money. It is only people who pay their bills who want that, Uncle George, and I never pay mine.”
Thus, Oscar Wilde should be credited with this dialogue; however, the acerbic rejoinder was spoken by a fictional character and not by Wilde himself.
QI conjectures that the second quotation in the inquiry was not written or spoken by Oscar Wilde; instead, it was derived from the first quotation via a faulty memory. Wilde died in 1900, and the earliest close match for the second quotation found by QI appeared in 1945.
Below are additional selected citations in chronological order.
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