Now I am a pretty big liberal here, so don't think I am defending our capitalistic society as being the best idea for the indentured servant masses...
...but...
If salary is based on profit, and investment increases profit, then investment is the best move. To say that an expenditure on parks will negatively impact salary is making quite a few assumptions.
Correction: "A bad investment in the parks would negatively affect CEO salary".
A good investment would increase salary.
So what are we really looking at? Risk. There is a risk with investment. Shoot, with most investments. Will doing X at the park increase $?
So why will the CEO not take certain risks? Well, we can take educated (semi-educated) guesses as to why or why not, but ultimately 'why' is when X is deemed unlikely to increase $.
And this whole shebang goes back to the laws of Supply and Demand. Iger can make changes that affect either, or both. That is really all he can do.
We do the rest!
Whatever happens to the parks, if they are packed, from a business standpoint success has been achieved. You say Hollywood studios is disgraceful, but the law of supply and demand dictate otherwise.
So whatever idea you have for Disney, lets call it Y, plug it in to the equation....
If Disney implements Y....
Supply increases, Demand increases = Ultra Win for Disney. This is the current model. Jammed parks, willingness to pay lots for tickets, maximized profits. The only thing that will change this is if demand goes down. In other words, when people are sick of the cattle car experience enough to stop going. But so long as people keep going...Iger is right.
Supply decreases, Demand increases = Could result in more crowded parks if profit were not the motive (from a sq ft perspective). Would likely simply manifest as increased ticket prices (thus driving down demand). This is the solution I proposed.
Reduce by half the number allowed into the park at a time and double the ticket price. However, it is not that simple, you would have to double everything. Food, lodging, etc. Alas, this would likely cause demand to drop below equilibrium which is a bad business move. Great for us, bad for Iger.
Supply increases, Demand decreases = Bad management in most cases. With high markup items this can work for a little while. Price plummets.
Supply decreases, demand decreases = Usually happens right before bankruptcy. An organization can balance on equilibrium and steadily ride the quantity sold curve down to zero.
Sorry for the long boring details. Reading these threads I cannot control the urge to do a quick business 101 lesson.