Lets look at the fleet owner that has 5 trucks and nets $20,000 per truck per year.
Now he sees that he'll net 10% less on the flat rate.
5 x$18,000 is $90,000.
Honey, what are we to do ? We can't keep the 2 Mercedes , the boat, and the cabin, with a $10,000 per year cut !
No problem...