How common was the "country girl seduced by rich man" melodrama plot?

Cafe Society
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See also Hogarth’s picture series “A Harlot’s Progress.” Innocent country girl arrives in 18th-Century London seeking work as a seamstress . . . and finds it, at least in the Ankh-Morporkian sense of the word.

There’s also this verse from Oliver:

She was from the country
But now she’s up a gum tree
She let a fellow feed her
Then lead her along
What’s the good of cryin’?
She’s made her bed to lie in
She’s glad to bring a coin in
And join in this song
Oom-pa-pa, oom-pa-pa, that’s how it goes!
Oom-pa-pa, oom-pa-pa, everyone knows!
She is no longer the same blushing rose
Ever since oom-pa-pa!

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And, still a salable plot in a setting as late as the Depression – see Pennies from Heaven.

And, in It’s a Wonderful Life, George Bailey Runs into alternate-Violet on the streets of Pottersville, and she’s apparently working them – at any rate, she’s a screaming drunken wreck. (No particular seducer is implied, however; it makes sense only because we always knew she was a whore on the inside, like all flirts are, and bound to go to the bad without George around to steer her straight/bail her out.)

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I love “Oom-Pah-Pah!”