http://icsc.un.org/resources/sad/ss/sal201201.pdf
A senior developer is usually P-3 or P-4. It may seem on the low side compared to market rates if you in New York or Geneva - but bear in mind they don't need to pay taxes and get quite a lot of other benefits.
Edit:
This site has more details on the salaries, benefits and theory behind it:
Performance is how you move up GS and step levels.
There's a complex social dynamic related to that feature in companies.
https://en.wikipedia.org/wiki/General_Schedule_(US_civil_ser...
My rent in Houston was $1100/mo for a 2 bed, 2 bath 1200 sqft luxury apartment in a nice development with hiking and biking trails. My rent in NYC for a 1 bed, 1 bath, 600sqft luxury apartment in a nice building with a doorman every other day (idk why) is $2300. More than 4 times the price per sqft.
Every day staples are 20-100% higher in NYC than Houston. Car insurance is almost triple. Parking which used to be free and assigned is now in a garage and $200-400/mo depending on where you are (thankfully mine is in the rent).
I think the government needs to re-evaluate their adjustments.
Locality is to make a job's salary competitive with other job salaries in the local market, whereas COLA is exactly what it sounds like.
Houston has a high locality rate because of all the high-paying jobs there that one could potentially get instead of the govt job.
I work for the govt and receive both locality and COLA, albeit the COLA is way too low in my opinion (Honolulu).
In the WS scale the 3 highest paid is in KS, MI, and Atlanta. I think they consider what other positions in the same kind of fields are paying for the area.
[1] https://www.opm.gov/policy-data-oversight/pay-leave/salaries...
That's clearly one of the more disaster prone areas of the world.
- you only seen tax return figures, and depending on your family situation, property ownership, tax class, benefits the spread in paid taxes can be easily 2x on same amount. Hardly usable for finding out if someone makes 20% over you.
- the data was available with 3 year delay.
In fact, given the number of people who said this would be a disaster for a company of 25 people two years ago, there's an even greater onus to provide real reasons transparent salaries couldn't work at other companies.
I doubt that BMW has an engineer that earns more than his / her colleague at the same position.
Bob is Engineer, and Joe is Engineer+; it's clear to everyone that Joe is earning more, and if Bob feels underpaid then the explanation for the salary difference is explicit in that he's not (for whatever practical reasons) doing the work/quality/quantity/whatever of an Engineer+.
All they'd do was promote you to the next level and give you a salary in the next range.
Only few engineers in leading position and with larger responsibilty are paid based on an individually negotiated contract.