That was all written into the rulebook in the last parliament by the Wright Committee, which designed the new system of elected committee chairs, with the aim of preventing party political attacks on them.

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The situation reached a boiling point in the 1970s, when in the aftermath of Watergate, reformers transformed the system by weakening committee chairs, empowering party leaders and opening up the legislative process through sunshine rules and more.

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The cross-party committee said it believed the majority of claimants would be able to access the new system and the shake-up would help "ease the transition" from benefits to work.

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