Come on, no way you can claim that.

Let's take a Principal Engineer. A bad choice to make my case with, because among others, they do pay rather well. For a Principal Engineer, it is sort of a job requirement at that level to save or generate of the order of ~100 million dollars per year. An outsourced engineer sees nowhere near 1/10th that amount in his/her salary.

For non software engineers it's much worse.