Just You and ...?

One of my pet peeves is the loss of the expression you and me. People don't say it any more, but repeatedly say "you and I" where they should say "you and me."

But where did this begin? I think I've found a clue.

In Series Two of Get Smart, in the episode A Spy for A Spy, Max says to the chief at the end of the episode,

That just leaves you and I, Chief.

Tsk, tsk. The old nominative confused with objective trick.