Such an increase can actually be quite feasible; quadrupling the labor spent on final examination would be perhaps a 10% increase for the total labor spent on preparing and teaching a university course, and at university level (unlike earlier schooling) we don't really have a shortage of educators, quite the opposite.

Yes, it is simple. This already happens for AP exam grading, for example. Seasonal temporary graders.

Happens in tax filing too.

I think it’s a good exception case for the 1% of false positives.