I'm not aware of IBM's experience in other jurisdictions. When the decision was made to go with different options for a pay system back in 2009, a number of options were examined and it was felt that a commercial off-the-shelf product would be the best route to go. A competitive process was run and IBM came to the table with PeopleSoft, which I believe is one of the largest HR management systems in the world. As well, the Government of Canada was going with the PeopleSoft HR system as well, so it was felt that the HR and the pay system would be best able to talk together if they were using the same software.
On July 28th, 2016. See this statement in context.