The whole principle behind "mustashianism" does not use income as part of the calculation either. Its spending, which is what this article is beginning to touch on. If you need less to "live", you don't need as much saved.
While a very misleading and ridiculous title to draw in readers, it starts to present what MMM is all about (though very loosely). But it fails because it makes the assumption that you will work until at least 59.5 when you can draw from retirement. But if they feel anyone is saving TOO much for retirement? That's pretty damn silly to say the least. Then ends with:
Most Americans aren’t saving enough for retirement, and one of the most common regrets among retirees is that they didn’t sock away more when they were younger and bringing home a steady paycheck.
Nullifying the entire article...