The government lawyers should face disbarment for lying to the judge about the DHS's actions. These aren't prosecutors, they don't have immunity and they have professional duties that _absolutely_ do not involve lying.
It's not. The lawyer who made the statement is Paul Freeborne. He's not outside counsel, he's a DOJ employee. His salary is unlikely to be surprising to, say, a Silicon Valley programmer. If he's been around a while, he's probably somewhere between $100-150k with locality adjustments.
He'd be doing much better in the private sector, even as an associate in a law firm.