The 'burden of proof' is on the plaintiff, since the defendant is presumed innocent until proven guilty. [=the plaintiff must prove that the defendant is guilty]
The 'tax burden' has been falling increasingly on the middle class. [=middle class people have been paying a greater portion of taxes]
For the rest of his life he 'was burdened' with the knowledge that he had done nothing to help them.
(..) "There's little doubt that Paylor will carry it. "She's become the voice of reason. "I'm sorry so much burden fell on you. "I know you'll never escape it. "But if I had to put you through it again" "for this outcome, I would." "The war's over. (..)2015 The Hunger Games: Mockingjay - Part 2
(..) Won't you join us? I have invited you all here for several reasons, but first, I have an announcement. I have taken the burden and the honor of declaring myself interim president of Panem. Interim? Exactly how long is that interim? (..)2015 The Hunger Games: Mockingjay - Part 2