A junket: an extravagant trip or celebration, in particular one enjoyed by a government official at public expense.
So according to Joan Nancy Pelosi's trip to Afganistan is a junket? If it was, I'd think a war zone would not be the best choice.
I would remind Joan that the Speaker of the House is 2nd in line to the presidency after the vice president. As such, she need to be kept informed just as much as the President.
Furthermore, after 9-11 the Speaker was specifically prohibited from using commercial aircraft while on government business. Trump knew that right? Obviously, Joan didn't, or she would not be making an ass of herself about it.
Meanwhile, Trump authorized Melania to take a junket to Florida.
As for doing their job, a bill was placed on the Trump's desk. It was approved by both houses of congress. Trump indicated he would sign it until suddenly he wouldnt. He's the one that is not doing his job.