I mean, this isn't MLB where the Yankees 20 years ago spending 4X some teams to win world championships, or the NBA where if there is a cap it's merely a suggestion - this is the NFL with a hard salary cap. Yes, the Rams "bought" this Super Bowl by bringing in an all star cast. And with the way the NFL works they're going to pay for it in a few years because they have given up a ton of draft capital to get where they are now.
Well if the goal was to win a championship they attained it.