By 'make' I'd like to point out that on average, workers in tech literally 'make more' (i.e produce more) value for their employers. Which is precisely why compensation is better.
Besides, the economic notion of value is an incredibly slippery concept. Not only does it include bargaining power (so your value can decrease even if your economic productivity increases), it weights in the wealth of your customer too -- better to entertain a banker than to feed a poor. "Value" for the purpose of economics is typically quite far from "value" for the purposes of morality.
3rd reason not to be a dick about this: the wheel turns constantly, and we will not be on top of it forever. See: any mature engineering discipline, or even past performance of SW engineering.