The Biden comment yesterday is on
YouTube so I can't watch it from work to judge context for myself. (I don't know which Scranton TV station it was one to see if their web site has it.)
But
per this article on McCain's comments in response, Biden did not give $150,000 as the threshold amount for receiving tax benefits but rather simply as an amount that would (and in comparison with someone making $1.4 million who would not).
If that is not an accurate representation of what is in the video I can't currently watch, I'm sure someone will say so.