In April every year, millions of Americans have to file their taxes, which can be an incredibly difficult and stressful time. 

That means that the IRS has to deal with a lot of angry and confused people (some of whom include mustard with their cheques, as well as various other fluids) and that's not entirely fair. Like everyone else, they're just doing their job, and thanks to a number of budget cuts, that job has become increasingly difficult. 

In his inimitable style, Oliver decided that he'd lay out he case for why the taxman has a tough gig and, in an ode to their hard work, he enlists the help of Michael Bolton to sing a version of 'How am I Supposed to Live Without You'.