Talking about the Labour Manifesto, I was listening to 5 Live before and they had two people on discussing it. The first, who was pretty well in favour, was the former Greek Finance Minister, Yanis Varoufakis. Gave a very good review, coherent & heartfelt. Then they had someone who was critical of it. They described him as being from the Cato Institute, which I'd vaguely heard of. But he was clearly so ideologically driven that alarm bells started ringing in my head. So I looked up the Cato Institute and it's a right-wing, American libertarian group set up by the infamous Koch brothers.
So the BBC, without providing any context, is allowing an avowedly extremely economic right-wing group to spout its propaganda, rather than have an intelligent discussion.