He was getting paid peanuts for designing and building an essential system for the running of the park all on his own, working for a guy that constantly bragged about sparing no expense.

IIRC the only interaction between Hammond and Nerdy went something like "you should have negotiated a better contract! Stfu gbtw", which can pretty much sum up the whole wealth divide between the owners who gain most of the benefit and the workers who actually do the things under capitalism. Except if they aren't getting the better of everyone on average, they just shut the whole thing down or find others that they do get the better of.

It still comes down to Hammond not paying Nedry enough although he claimed he "spared no expenses".