I'm not sure this is entirely true. While I agree that we might be automating our work away, it's not zero-sum. New technologies and industries will develop creating new spaces to automate. There are tons of things that computer scientists in the 70s couldn't even dream of. I'm sure there will be things we couldn't even imagine in 50 years. I'm not saying the rates of growth and decay are the same, but it's definitely not just all decay.
