Holy smokes! That is good money. I doubt that any DH in CO makes near that much.
The people in the offices do not all do the same work. The highest skilled make the most money.
It’s a matter of supply and demand. I used to be a dental hygienist and was making $40/hr back in the seventies in Phila, while hygienists in VT were making $40/day. They make $60/hr where I live now. Most don’t work a $40 hour week, though.
I suspect they do.
The taxes and everything that goes with living in Connecticut are soooo high that those high salaries are needed to survive. That is, if you are actually trying to be productive.