Not to disagree with your post, I basically agree with what you have said. But....
This summer it was the same %, However we have had multiple seasons preceding this one where we have offloaded Wharton, Szmodics, got the Raya money, and reinvested basically none of it.
Remember that incommings do not impact Rovers budget, our budget is for some reason set in stone and cannot be altered increased ever. So if we are to take Rovers/Gestede/Pasha at face value (I know, I know), we have only spent that % this summer by pure coincidence, and our past transfer income vs expenditure does back that up
Edited as per Wilsden