This thread seems to suggest that there are heaps of 20$ bills lying all over the world and accessible to any software engineer. That they are not being picked up suggests that there's some other constraint. Either extracting this value is not really worth one's time, or the bottleneck is not the ability to automate things but some other rare skill.
And when you get right down to it, and start having the type of deep dive talks need to have with potential customers, you'll quickly discover there's already solutions to almost every conceivable problem out there, even in the some of the most esoteric fields you can imagine.