Interesting that US article and accords with my personal feeling that the take-up of any FRI could be poor unless it was sufficiently large to offend the Daily Mail & Sun headline writers (''RAF pilots get bribes equal to five times nurses' salaries!'')
An FRI of circa £80k after tax spread over 5 years doesn't really compensate for the loss of seniority in an airline, better to get onto the ladder sooner rather than later.