In broad terms, there's an infrastructure replacement program that is required over time. If you imagine that the Government of Canada's total IT infrastructure were, say, somewhere in the $4-billion to $6-billion range, given the depreciation rates of IT equipment, that figure would imply something in the neighbourhood of $750 million to $1 billion of replacement a year, just to give you a sense of scale.
On December 6th, 2018. See this statement in context.