In March 2021, she defected to the Alba Party at its campaign launch for the then-upcoming Scottish Parliament election.

[2][3] Wilson became a South Ayrshire Councillor in the 2012 local elections for the ward of Ayr East.

[7][8] From 15 September 2016, she had employed her daughter Shannon as a caseworker/personal assistant, which was allowed under IPSA rules up until the election in June 2017.

[9] From the period of 1 June 2015 to 31 May 2016, the statement, Wilson claimed a total of £94,545.41 in public expenses, which was the 7th highest amount of any MP in the United Kingdom that year.

In 2016, Wilson and Chic Brodie, an SNP MSP representing the South Scotland electoral region at the Scottish Parliament, faced controversy over a public expenses scandal, with Chic Brodie transferring £87,616 of public expenses into Corri Wilson's Caledonii Resources for "outsourced constituency work" after her election as councillor to the Ayr East ward in 2012, with some £20,000 being transferred during the Scottish independence referendum campaign in 2014 and a further £20,000 being transferred during the 2015 UK general election campaign, well in excess of Independent Parliamentary Standards Authority guidelines.