Harrison Bergeron - that was it. Depressingly prophetic.
You beat me by ONE second.
I have thought of this specific story in the last year or two, and it isn’t hard to see why.
It would solve a lot of the issues involving in mandating equality. I do think Vonnegut might have missed the boat on a great opportunity to include normalizing genders - but he may have left it out just to get the story published.