Earlier quoted context omitted.
I think I asked this from you in another thread - but this advice feels difficult to follow. Are you in SF? Do you work at a company like Netflix which is known for paying very high salaries? Or are you not fully a developer, but in management? Because national labor statistics show that even the top quartile of salaries is still much lower than this, so I'm not sure how realistic it is for even the HN crowd to just…
The number is "high" as a single datapoint, but only due to an inflated SanFran economy. A $250k SF job adjusted to where I live in Dallas is actually considerably less than I make. I would need nearly $370k in SF dollars to do the same thing. http://money.cnn.com/calculator/pf/cost-of-living/
You should adjust, for cost of living, only the part of your paycheck that you will be spending while living in that area.
E.g., supposed SF is twice as expensive as Dallas. If you make $100k in Dallas, and you typically spend $70k of it in Dallas while saving $30k (to spend later in life somewhere else), you would need to make $70k x 2 + $30k = $170k in SF (for an overall adjustment of 1.7) rather than $100k x 2 = $200k in SF (for an overall adjustment of 2).
Then again, if you're planning on living somewhere for the rest of your life, it's safe to assume that whatever money you make in that place, you'll also be spending in that place. Therefore, in that situation, multiplying by 2 would be correct after all.