I'd love to be in a position where I can predict whether I'll make $4m+ or $6m+ profit that year - or whatever the actual figures are. I think last time I looked into it, Chaos were valued in the billions.
I think my biggest issue is just how steep the increase is when you total it up. I've seen comments from the Corona mods justfying it by saying things like "there haven't been any increases in X years", correct there haven't, but you've just made up for that by bundling all those missed incremental increases into 1 massive hike this time around. It's just the sheer audacity of it. I'd be more open to it, if they said "there haven't been any increases in X years, so this year we need to slightly increase the price and moving forwards the price will increase in line with our costs etc etc"
I might try it with a client, "actually on your last few jobs I charged you way less than I probably should have, so this time round I'm going to charge you double/triple, I'm also stripping some of the benefits I've given you over the years, unless you decide to pay for your next few jobs in advance today"