> So, ATMs did impact bank teller jobs by a significant amount. A third of them were made redundant. It's just that the decrease at individual bank branches was offset by the increase in the total number of branches, because of deregulation and a booming economy and whatever else.

There's an important point here that you're glossing over. The increase in the total number of branches doesn't have to be unrelated to the decrease in the number of tellers each branch requires to operate. The sharp drop in the cost of operating one branch directly means that you can have more branches. This means it isn't true that "a third of bank tellers were made redundant" - some of them were reallocated from existing branches to new ones.