Interesting, I've had the opposite experience. I get paid a ridiculous amount for Elixir work because finding experienced Elixir devs is so difficult. Most of the job offers I get for it I avoid because I think "there's no way this company is going to last longer than a year paying that much for developers".
I'd love to know what the going rate is for experienced Elixir developers. I'm interested because I'm toying with a side-project and can still choose the stack after the prototype, and I'm also a developer that knows both Rails and Elixir.