Using more assistance for a leader and less for an anchor...

What is the rationale or thought process around doing more assistance work during an anchor, when you are pushing PR's? It seems to me that it would make more sense to do 5's Pro, whatever supplemental, and 50-100 assistance, during a leader. Then, during an anchor, when pushing hard for PR's, back off of assistance...maybe 25-50, maybe less.

Having run a lot of various programs, they all work the way I'm describing. The harder you push on the main lifts, the less assistance you do.

I'm not making a statement of fact about this, but just asking if anyone has good logic that explains this process. It feels like it's a little backwards. I do it just because what the hell do I know about programming, but also asking here to learn if this process seems right? And, I hate second guessing Jim Wendler. But, it does seem to not follow typical programming.

Again, I'm just asking, not really wanting to be controversial or start arguments.

Yes, I own all his books, and even some of his very old content from Elite FTS and even a paper from his time at Westside. And I can say, man, has he changed. LOL

At the end of the day, I follow it as stated. But, I do wonder why it's that way.