Probably had a quick guesstimate round their overpaid office, added up the nanny / au pere fees, pre-prep school fees, eloqution lessons, 3 holidays a year, clothes from baby @ Harvey Nicks , nursey designed & fitted out by Conran etc...
thought it sounded excessive, but then seeing how expensive life is then thought maby its not far from truth (£50k is only 10K a year - £800 per month). When you consider getting your baby room set up, fees, medicines, care, clothing etc... I suppose it could equate to nearly half that????