Your plan presumes that somebody qualified to be a bank teller has the smarts to be able to design or maintain ATM machines. We are headed to a point where the value of the production of people with IQ under 100 is not worth the cost of feeding them. (At least for guys with IQ under 100. Something might be done with the more attractive women).
Then you would be surprised at the difference in productivity the right attitude can produce. I often find people who are not "qualified" operating "beyond their pay grade" - eg software developers who were originally trained as social workers or english majors or painters (and I thought painters were unrecoverable cases, heheh). There is more to intelligence than "IQ", and I predict in this future machine utopia we will still prize critical thinkers, effective decision-makers, designers, interior decorators, and social butterflies, as always. It just may not be in a way that is familiar to YOU.
The essential truth is that to earn a living or become wealthy you have to do things that people value enough to trade for, however little or however much that is. But it's never been a constant in any dimension of skill or cost (though that relationship between a the price of a nice suit and and the price of an ounce of gold should set you to wondering).
For me the answer is clear - seek opportunity and exploit it. Leverage my skills and experience where applicable, learn new things to prepare for the time when what I know doesn't apply, work with others to gain collective effectiveness. Plenty of people never figure this out no matter how singularly intelligent they may be. What's new? Ultimately it boils down to evolution in action. Anyone can make a buggy whip now, but only the truly talented and determined can make a living at it.