CFAI ECOC Reading 21 Questions 2 and 3 (Page 464)

Need some help from you guys out there on these 2 questions. Relating to the amounts that need to be mimicked by real and nominal bonds, I understand that the retiree component is fully mimicked by the real bonds and the deferreds and active accrued by the nominal bonds. What I do not understand is the parts relating to future wage inflation and real wage growth and I reckon that its because i do not understand the statement in the vignette that says “Approximately half of the future wage inflation liability is assumed to correlate closely to CPI and half of the future real wage growth is assumed to correrlate closely to domestic equities.” Can anyone explain? In addition, why is future real wage growth factored into calculating the mimicking for nominal but not real bonds? Thanks!