Mark Spencer
Mark Spencer appeared to warn voters Keir Starmer's party could be too popular.
The audience could not help smiling in response to the BBC Question Time presenter's correction.
"And you're going to deserve to lose," the audience member said, scathingly.
A Labour MP said he was showing his "ignorance".
"Oh, so it's OK for us to pay your expenses, but you don't have a plan to help us pay our bills?"
Mark Spencer said voters were more concerned with the rising cost of living and NHS backlog.
Commons leader Mark Spencer confirms PM's ethics adviser has been called in to probe racism allegations against him.
Labour say Mark Spencer's appointment as Commons leader is "completely inappropriate".
Alex Feis-Bryce, who reported a sexual assault by an MP almost 10 years ago, said he was "astounded" by how common stories of harassment were.