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.
(..) in one final zinger, about how I let her down, and about how I was fat and stupid, and too tall to be an effective Lindy-hopper. How I was needy and a burden and an embarrassment. All that I was ready for. I was not ready for "I see you." Only my mother would be lousy enough to swipe me (..)2018 TvShow: BoJack Horseman Title: Free Churro Season: 5 Episode 6