Most of these deals have been stupid, driven by teams flush with cash who didn't work out the consequences.
Even the Yankees eventually realized that wasn't sustainable.
The problem isn't paying top dollar for production, it's paying top dollar for non-production.
Cabrera's first deal was an underpay, his second deal will end up a disaster.
Pujols (-0.6 WAR this year, Howard territory) - 9.1 WAR for $75M from age 32-35 was reasonable, unfortunately he'll cost $25M this year at age 36 for replacment level play, and $140M from 2017-2021.
And no, WAR isn't worth $9-10M
Most of the inflation in baseball was a few franchises with big cable deals.
It remains to be seen how much money there is on the internet, ask the music business if streaming is as valuable as CDs!
And baseball has almost no international potential, there's Japan, but they have homegrown baseball with Japanese players, central American and Venezeula, loyal but poor (i.e., little economic potential) and ???
NFL Europe folded, the idea of a NFL franchise in London will be LA but far worse.
Soccer is the world game, followed by basketball.
The NFL has its NA niche, ML baseball is a little wider but ithere's no evidence that Korea or Japan are going to be significant markets.
So if you concede that last year WAR was worth $7M (but that's delivered WAR, expected WAR should be discounted for risk), and 10% inflation continues for two years, that's $8.5M a delivered WAR in 2017, then 5% inflation, you don't get to $10M a WAR until 2020 - and I think that's optimistic.
You should apply a 10% discount factor after age 30 to expected WAR when judging these contracts (about the decline modeled by Fansgraphs and other sites), not project as if their peak year WAR will continue indefinitely.
The best contracts are fora player in his mid-20s, instead of an opt-out I'd just pay more for his peak years, opt outs are foolish because they shift all the risk to the team.
If teams continue to be stupid, I'd spend my money taking bad contracts off their hands if they give me good prospects for the privilege, overpaying a 4 WAR player for the last 2-3 years of his contract can add talent and build the farm system while getting teams out of cap hell (done all the time in the NBA and NHL, with these contracts expect it to become the norm in baseball).