Imagine that the studio makes a movie that uses a famous song, actor, or other piece of intellectual property that is very expensive but they know it will boost box office sales. They might spend $5 million on this IP and it might generate $6 million in additional revenue.
Now, some people look at the $6 million in revenue and ask where their cut is. Of course the studio doesn't actually have the $6m, they only have $1m after paying for the IP. Extrapolate this out for a whole movie.
This is why it doesn't make mathematical sense to compare your wage to revenue - it is ignoring business fundamentals. Instead we need to look at profit which already has all expenses subtracted out. Profit is where any additional compensation must come from, or the studio needs to cut expenses elsewhere.
Agreed, but that doesn't make the pie chart valid. It makes zero mathematical sense to compare worldwide revenue to a single cost unless all other costs have been subtracted out first.