I think that's the point. Something will come along to replace it, and that thing does not historically pay better. "Your margin is my opportunity," as Lord Bezos said. It's already kind of happening. I could get $25 per extremely plain HTML page when I was a kid because that was a rare, in-demand skill. Now $20 buys 10 fancy Carrds. Every new framework or language or platform is chasing an efficiency or simplicity that opens it up to people who'll work for less or lets one person do the job of 10. There's always an initiating event, and then the prophecy of the tech adoption curve takes over.

Someone is gunning for the margins behind those salaries, but the people making those sums don't know it yet. If I knew where it was coming from, I would email them about a collaboration, not post it here.

edit to add: It can be a slow boil or a rapid shift. Google swept the search engine space in a few years, but Netflix and Blockbuster traded places over decades. Now Netflix is struggling as third-party content retreats into publisher silos.