But of course if salaries go up evenly throughout a forty year lifespan and the Chairman is given a forty year lifespan which is quite or pension lifespan which is quite a suitable one, if salaries go up and someone leaves their company every ten years, then the first three departures are obviously going to be at much lower salary levels and it's not going to be satisfactory the first three departures are just index linked to inflation, there is the problem of how does one index link them towards the final salary.