There are enough Disney adults with money and no kids who will happily keep paying whatever Disney demands.

However, they’re going to kill the Golden Goose that way. Disney was so successful with families in the last century that these Disney adults are paying to recreate their childhood. But if families can’t afford the parks anymore there won’t be a generation of park goers in twenty years, and revenue will plummet as younger generations seek other experiences. Given the massive investment and operational costs associated with the parks, that could be a big problem.