> After 100k, what difference does it make for one's happiness?
Fairly significant depending on the location. Keep in mind that for Washington DC, the average cost of living required income is 91,388 for a family of four[0], or 76,894 after taxes.
This role pays $105k after taxes. One way to think about this is this means you have $2.3k per month in discretionary funds, versus 16.5k per month of discretionary funds for a big 5 job.
If you're considering retirement, you'll achieve your savings goals 7 times faster with big tech. That's a big difference in happiness.
If you're considering education for your children, you can afford private school or an ivy league education with big tech. With the government role you can't.
Certainly there are a select few who will look at this and be motivated to serve their country, but more and more what we're seeing is that patriotism is at a record low[1]. If we're looking to attract the best of the best, we're culling the selection pool greatly by underpaying significantly. Relying on patriotism and asceticism is a hard thing to bet on.
[0] https://livingwage.mit.edu/counties/11001
[1] https://news.gallup.com/poll/394202/record-low-extremely-pro...