The 'cheap' view is cute and all with the 'driver makes more than me' shtick.

The driver knows who tips come from. He/She will probably be more apt to be on-time for crews that tip them. I'd rather set a trend of giving them a dollar rather than sitting on the curb for 45 minutes after a long day. If that 1 dollar is more important to you, and your crew, more power to ya.