What would motivate someone to do something like this? I don't get it. He had to know he'd be found out eventually when the magic superconductors didn't work.
It's because writing research grants, getting them approved, and publishing papers on that research has become more about getting the money and less about producing quality results.
Sure, because there are millions in that field and nobody will remember him? This is a niche, extremely specific science field. They all know each other at a certain level.
I can't watch something with sound right now, but even if he got some money out of it, wouldn't it be less than he loses by ruining his entire career and reputation? I wouldn't even hire someone who did that as a cashier. I'd expect them to steal from the register or something.
The harder it is to reproduce the experiment the less likely you are to be caught, and in the meantime you get paid to live your dream job as a world renowned scientist. It's the whole "fake it til you make it" scheme ever-present in every field.
Not really, they get caught within a few years usually. It just takes a much shorter amount of time to get caught for a simple experiment than a more complicated one.