The lady worked part time, granted. However, I would expect a high-skilled job such as teaching to pay enough for a living even on part time - 3,500 USD for a whole course seems a bit on the cheap side for me.
Then, there's a couple of other factors that come into play: The university only hands out part time contracts, so they're in a position to keep the wages low: Demand too much, no problem, we'll take another teacher for your course next year. I dispute your notion that academia in general pays enough. The given university pays an average of 20 - 25k to 75% of it's teachers. That's about half of the average wage in the USA. Even if they're working part-time that's still way too low for a job that requires university grade education. That's the people you entrust your childrens education to, not your dishwasher.
I assume that most of those 75% would love to have a full time job at the faculty, but the faculty obviously doesn't let them. So they either have a second/third job or live on scraps. Neither of those options is even remotely beneficial to the students education.
Then, there's a couple of other factors that come into play: The university only hands out part time contracts, so they're in a position to keep the wages low: Demand too much, no problem, we'll take another teacher for your course next year. I dispute your notion that academia in general pays enough. The given university pays an average of 20 - 25k to 75% of it's teachers. That's about half of the average wage in the USA. Even if they're working part-time that's still way too low for a job that requires university grade education. That's the people you entrust your childrens education to, not your dishwasher.
I assume that most of those 75% would love to have a full time job at the faculty, but the faculty obviously doesn't let them. So they either have a second/third job or live on scraps. Neither of those options is even remotely beneficial to the students education.