A disaster of epic proportions is in the making because companies are pulling the plug on final-salary pension schemes, claiming they can no longer afford them. These plans are the bedrock of the occupational pension system, promising employees a proportion - normally a half - of their final salary at retirement. But in the past few years, the costs of running such schemes have exploded skywards, causing major companies like Marks & Spencer, BT, Whitbread, ICI, Lloyds TSB, Sainsbury's and last week Abbey National, with a record of paternalistic philanthropy towards their employees, to pull down the shutters.