Mr Ellis added that about 21 staff were currently nearing 30 years' pensionable service and that recruitment for 30 new officers had begun.

BBC: Matthew Ellis

But charters also need to attract one class of candidates who are likely to be very keen on defined-benefit pensions: teachers who have already accrued years of pensionable service in public schools, and who want to keep accruing service so they can reach that rich third decade.

FORBES: Charter Schools, Pensions and Golden Handcuffs