Undoubtedly dues we will see in twenty years would shock us into unconsciousness if we saw them now but that is the nature of the cost of everything as time progresses. There is the 15% cap per year on dues, but if it is any comfort, Disney really cannot just raise them 15% in any given year because it must follow accounting procedures applicable to annual dues for condominiums, coops and timeshares. The dues estimated for a year must be based on expected actual costs. Disney cannot build into the charges a profit. It does have a "management" fee, which funds MS operations and overall management of the resorts, from which it likely makes an allowable profit, but the fee is set at 12.5% of the rest of the annual dues except taxes, and thus though the actual amount may increase annually as dues increase, the percentage cannot be raised. Thus, when dues rise it is because costs have risen and the highest percentage of your dues is for employee (of Disney and outside contractors) costs.