Could be for fast workers...
I'd have mowed over them before bagging, those leaves would mulch up real nice...big and leafy...plus reducing the bulk would make blowing much faster.
The guy on the other side of the fence blowing would have helped move them faster your way...also one guy with a rake to move the bulk along works nice..while others with blowers get the remaining.
That amount of leaves in one place could have the bulk/reduced bagged very quickly...not worrying with getting all, just the bulk and then making the blowing go much faster. You put the trash bag on the ground, ....hold bottom of opening down on ground with feet spread out, on your heels, hold open with one hand and use your other hand as a rake to get the bulk in the bag.
1989 BlueChevy 1500 Extended cab with FULL bed
1978 7ft Sears cargo trailer with added wood inserts to hold both my weedeaters
3 1976-83 vintage lawnboy lawnmowers with full self propel features as well as mulch kits
2 Sears electric weedeaters
1 green machine electric leaf blower
1 sears articulating hedge trimmer-electric
2 50ft power cords
3 Leaf rakes
1 pocket knife
cooler for beer
lawn chair to enjoy a beer while I wait for the cash to be handed to me