That just proves that there's a certain class of rich people (diplomats? lawyers?) that have plenty of work in the D.C. area and they've carved some neighborhoods out for themselves. It doesn't prove anything about what life for a DBA in D.C. would be like.
Glassdoor shows the pay for DBAs in the DC area are above the national average.
For software developers, the median salaries are below those in SF and Seattle, but if you are a FAANG level engineer, Amazon’s pay scale in NOVA is identical to Seattle and Facebook pays similarly.
> carved some neighborhoods out for themselves
This is an effort to imply that the suburbs of DC with high median salaries are small enclaves. This could not be further from the truth. Fairfax County, which has the third highest median household income in the US, is over a million in population and the largest county in VA. Montgomery County is the largest county in Maryland, also over a million people. So these counties are not separated from the rest of the metro area, but instead have over 2 million people in an MSA of 6 million.
Outside of subsistence salaries, which are not sustainable long term through illness, emergency, and retirement, rate of growth of net worth is a better metric.
Point being, putting 2X thousand dollars a year in long term savings in NYC is a better financial choice than saving X thousand a year in Townsville but having a nicer neighborhood or something.
Not that the dichotomy works exactly that way, but adjusting gross salary of a senior software engineer by cost of living makes little sense since only part of her pay goes to cost of living.