Pedant's revolt

Where language is concerned, we (husband John and I) are pedants. This is not always a good thing, because we are often too easily irritated. After all, language changes and develops, and that's the way it's always been. But there are things that really get to us, and last night we heard one that made us both leap from our chairs to yell at the screen. It was this:

"Everything comes to he who waits," said the speaker, a supposedly educated character in the film The Young Victoria.

Now, that might be forgiven in everyday speech. Just. But this film was (presumably) scripted and edited; the lines were learnt and rehearsed; and then the actor was filmed speaking them. How on earth did such a blunder manage to slip through the net?

Sigh...