This might sound silly but is there anything for us (members) to do to keep them from increasing faster? Maybe even stay stagnant every once in a while?
Doubt it. With the exception of our current economic situation, we tend to live in an inflationary economy. That means prices keep going up.
Look at all of the things our budgets cover:
Salaries AND BENEFITS for ALL of the resort staff including front desk, housekeeping, maintenance, etc. Wages go up (Are you making the same salary you were 10 years ago? 20 years ago? I hope not!) Benefits cost more. Health insurance costs have risen 5-10% annually for a decade now for most of the country.
We pay the premiums on insurance for the resort itself (P&C, hurricane damage, etc.)
We pay for the theme park buses / boats / monorails along with fuel expenses and more wages.
We pay property taxes to Orange County.
We pay to replace the roof on the building and to pave the parking lot.
We pay to replace broken refrigerators and door handles and blown-out lightbulbs.
All of those things are going to go up in cost every year. Not much that can be done about it. The good news is that wages (yours and mine) also increase so hopefully the dues will remain about the same portion of our budgets. A job that pays $60,000 today (and probably paid $25K a couple decades ago) will pay $150,000 by 2030. At least we all hope so.
Honestly the only portion of our dues I can think of that is really in our control would be maintenance. If members collectively beat the crap out of furniture, appliances, fixtures, put gouges in the walls, crack the bathroom tile, etc.--those are all things that cost money to repair. But I'm not sure that one member can make a difference in that area.
Unless we want to see Disney cut back on staffing, take a harder stance on wages in union negotiations or buy inferior quality furnishings, I wouldn't hold out hope of dues going down.