According to one historian, Falconer and his Liberal colleague Frederick Handel Booth were determined to prevent any disclosures damaging to the ministers in opposition to the roles of the Conservative members of the Committee Lord Robert Cecil and Leopold Amery.

[8] Falconer's experience as a Liberal propagandist and lawyer served him well as he took a prominent part in the examination and cross-examination of witnesses, although he had been forewarned by Isaacs that he had purchased some shares in the American Marconi Company.

From the time of his first election address in the Forfarshire by-election he identified himself as a land reformer, supporting government proposals to give smallholders security of tenure at a fair rent and providing capital for new buildings.

[10] He took a leading role in the enacting of the Small Landholders (Scotland) Act of 1911 which incorporated the grant of security of tenure at fair rent into law [11] and he was the founder of the Scottish Rural Workers Society,[2] a friendly society designed to provide social insurance payments in the event of sickness or prolonged absence from work.

[12] In 1925 he was appointed to a joint Board of Agriculture and Scottish Office inquiry into unemployment among farm workers and related social insurance schemes.

[13] In 1917 he served on the Board of Trade Parliamentary committee set to deal with the question of the cheap supply of electric power.

[14] The committee concluded that a national, comprehensive system for the generation and supply of electricity at the cheapest possible rate should be instituted after the end of the Great War to ensure the competitiveness of the industry, replacing the current organisation of the industry in small areas under many separate authorities which were not large enough to research or sustain the necessary scientific improvements.