If you are creating 10x the value you are paid, then plenty of other employers will offer you a raise.

If you believe you are seriously underpaid, explain to your employer what value you are creating, and negotiate.

If you start your own business, you'll find out exactly what you're worth.

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.