People should be aware though, your example isn't even close to usual.
Work the numbers for a simple case - for round numbers take 100k/yr and 1000/month disposable. To do 8x that you are adding basically another 100k, post tax - so add another 35 k.
Do at this rate you have a salary multiple of 2.35. This just doesn't happen in general, for the same job. You may have an opportunity for a different job at 2.5 timed salary, but mostly people don't
Much more realistic is a 30% bump, which is still on the high end giving you a disposable income multiple of 2.5, which isn't bad.
Anyway, the numbers vary a bit with higher salary and rates, but mostly people won't see anywhere near 3x, let alone 8x - unless they are comparing very different jobs.