...immigration numbers of low skilled labor, who are net takers...

Neither of these are true.

so where is that money going to come from

From the article:

...the $56.7 billion in cuts across the federal government is balanced by an almost identical $58.8 billion boost in the Department of National Defence’s budget... Carney has pledged to spend a staggering $470 billion over the next decade under the Defence Industrial Strategy.