I usually like Michael Gass' Fuel Lines, but this morning he has a quote that got me riled up.
“The sole purpose of Marketing is to sell more to more people, more often and for more money.”
This is from the person who brought us "New Coke", Sergio Zyman.
That sounds like the definition of sales and since Sales doesn't usually report to Marketing there must be something else going on. Sales is compensated for delivering the revenue and Marketing is responsible for greasing the wheels so to speak. How? By understanding better than anyone else how to satisfy their audience's needs.
For Marketing sales is an outcome, not an objective.