Here's a quick notion.
What's the difference between "cost" and "waste"?
(Not that this question would be part of any DOTC MPS Professional Certification)
Cost - "An amount paid or required in payment for a purchase; a price..."
Waste - "To use, consume, spend, or expend thoughtlessly or carelessly..."
Cost is the 'acceptable' amount of money you will pay for the water bill each month; waste is the act of leaving the water hose on over the weekend.
Do you see the difference?
Let's continue.
Consider: did all this 30-40% savings simply show up with the advent of MPS?
Weren't there closets full of toner cartridges, back in 2006?
Weren't companies leasing machines with 11x17 capacity, and never using 11x17, back in 2005?
How long has scanning been available? How about ECM and EDM? Or fax servers?
Waste vs. Cost.