This is just another election promise. It's not an outright lie, this is something that the Liberals would have done if it fell into their lap. But it's not something they will put any effort into. Some promises were lies, like the "balance the budget," then "$10 billion deficit." That doesn't turn into a $30 billion deficit by accident. But the pipeline, democratic reform possibly, assuring the "sacred rights of indigenous peoples," that sort of thing- that's aspirational, "hope and change." 
Nobody should blame the Liberals for this- Butts et al. have been doing this for a decade in Ontario. Chretien and Harper were a little more straightforward, but now we're also in a different time of social media. Promises are a little more fluid.