I was wondering to myself ("self," I said, to myself) about how much of the United States desire for other countires in NATO to spend more on their militaries was driven by the size of the Arms Industry in th US. I looked at some available data and global arms trade is relatively small (but significant) compared to defence spending.
In no way should there be an expectation that NATO countries should match the US expenditure per GDP... none of them of the worldwide "aspirations" that the US does, and shouldn't be paying to shore up the US's ability to "lean on" people in the interest of the US.
In any case, although I agree that Canada needs to spend more on their military, I think that 3.5% is too high; and certainly 5% is ridiculous. Something in the range of 2-3% makes sense. For context, it was around 4% in 1960, around 2% 1970-90, bottomed out at 1% 2013-14 (for anyone watching, the end of the Harper era), and has been slowly climbing towards 1.5% since.
We need to get to 2% as quick as possible and spend it on recapitalizing current capabilites and regenerating (which includes higher pay for recruiting and retention reasons). Then we need to use the goal of 2-3% after that for adding the capabbilites that should be core (subs and sufficient AORs, airborne AEW and surveillance, expeditionary C2 and logisitics).