Tom - when I said more volume for deadlift, I didn't mean while doing starting strength program.
When you consider that you squat, bench, deadlift Monday, then Squat, OHP, Power clean Wednesday, then squat, bench, deadlift Friday, and you are increasing by 2.5kg on each movement each time you do it, it gets pretty farkin hard after a while.
It gets to the point where doing all 3 movements in one session is too much.
That is why he has only 1 set for deadlift.
So I changed to a different program after about 4 months which is where I started not getting anywhere with deads.
You may be able to do assistance exercises at first, but you'll be too f**ked after a few months of incerasing each lift.