Class Equality in '"The Changeling"

One of the recurring claims that De Flores makes in his unconventional seduction/rape of Beatrice in III.iv -- and the one that seems to be the most effective in breaking her will -- is that the two have become social equals because of their crime (or, specifically, that she, now a "whore in thy affection", has been reduced to his level):

"Look but into your conscience, read me there,
'Tis a true book, you'll find me there your equal.
Push! Fly not to your birth, but settle you
In what the act has made you, y'are no more now;
You must forget your parentage to me:
Y'are the deed's creature; by that name
You lost your first condition, and I challenge you,
As peace and innocency has turn'd you out,
And made you one with me."

The play in other places has shown a concern with class and social pedigree -- particularly in terms of Alsemero's and Piracquo's claims to marry Beatrice and even Antonio's and Lollio's seductions of the married Isabella. Is this idea of social mobility through crime some kind of extension of the social mobility figured in the city comedies, but here perverted somewhat by the genre of the Jacobean revenge tragedy? Does the idea spring from the same cultural anxieties from the period?