Clwyd South MP Susan Elan Jones has repeated her call her call for MPs to be banned from having second jobs.
Ms Jones, who spent 15 years working for charities before she became an MP, said: "I spoke out on this subject last October in the House of Commons, when I was actually boo-ed by some Conservative MPs from the other side of the Chamber.
"These are the very same people that won't legislate to stop abuses of zero hours contracts, a practice that is making a life a misery for so many families in our area.
"I am glad that the Labour Party is leading a proper debate on the issue today and that there will be a vote too."
Today's Labour motion states: “That this House believes that, as part of a wider regulatory framework for second jobs, from the start of the next Parliament no hon. Members should be permitted to hold paid directorships or consultancies.”