In reality, according to Prof. David Cody, they:
The corn laws, in reality represented the power of the British aristocracy, who were the landowners, and therefore crop producers. A repeal of the corn laws would have jeopardized not only the income generated by crops, but the political power that land ownership had historically represented. The debate over the corn laws was a crossroads in the transition of Britain from a feudalist society, to a more modern, industrial one.
The debate within the Parliament was a divisive one. Benjamin Disraeli made a name for himself as a Tory and a defender of the conservative corn laws. The debate over the corn laws split Tories and Whigs. The Tories represented the landed class who greatly benefited from the agricultural protections. The Whigs however were business owners. Following David Ricardo's economic views they believed a decrease in the price of grain would allow them to lower wages and increase profits. The Manchester Anti-Corn Law League was formed by men such as Richard Cobden and Sir David Roche and they battled for free trade.
Ironically on January 31, 1846 it was a Tory Prime Minster, Sir Robert Peel, who repealed the Corn Laws. In Ireland, a fungus, called the blight had attacked the staple potato crop, causing a loss of a food source and income for Irish farmers, most of whom were tenants of absentee landlords based in Britain. While some British Tories were willing to let their tenants starve, Peel, who had a personal knowledge of Ireland, having served in the Dublin Castle British administration in Dublin, pushed also by Queen Victoria, acted to try to alleviate the Irish situation by repealing the Corn Laws. Peel and a few other Tory MPs allied with the opposition Whigs and passed a measure abolishing the Corn Laws. This destroyed his government, however, as he lost the support of his own party and they along with the Whigs voted to repeal Peel. The repeal of the corn laws did little to aid the Irish, as 700,000-800,000 Irish people had already died from starvation and even more had emigrated.
The Canadian colonies greatly favoured the Corn Laws as they prevented competition from US and South American grain suppliers. The repeal of the Corn Laws showed Canadians that they could not expect favourable treatment from the British and encouraged movement towards confederation.The Repeal of the Corn Laws