If one read's the entire post above this sums up the negotitations and what took place very well. What I find ironic about the above quote is it actually makes a strong case for Haye's side of this. It is admitting that Wlad is not bringing as much to the table here (which Haye said) but the article goes on to criticize Haye for not accepting less while saying Wlad should get what he wants. So basically saying Haye should be the one to take the step back and I can understand where Haye is thinking why should I step back.
Stepping back is the wrong way to think about this: if one fighter demands 100% of the purse, and the other refuses that plan: who should "step back"? It's not about that. It's about Haye refusing 50-50 of what is the maximum possible given Klitschko's multi-fight contract, and offering instead that Klitschko gets less than 50%, or breaks his long-standing and successful contract with RTL. Neither of these is a reasonable option, especially when Klitschko is the proper champion, and Haye the challenger.