Snippet on exec pensions

This is an oldie from last month, but LCP's report on exec pensions has an interesting little nugget in it. Where FTSE100 directors are given cash in lieu of pension, the median value of this as a percentage of salary has increased from 25% to 30% in two years. It's turning into into a nice little lump of cash, and no-one seems to be making any noise about it. Is there any reason - other than the malign influence of peer group comparisons - why the increase in % of salary has occurred?