Nobody will admit we need more infantry. But I think what everyone really wants is to disband the MP
. This is the best possible reason for that. The MP are under utilized now and already have the relevant training and the numbers/structure to get started. They already do other closely related tasks and are deployable. They could literally start tomorrow, add in surveillance technology and key PS positions for continuity and they'd be very effective.
Over the long term, I would re-structure the entire outfit to be a ground force protection unit that operates domestically and in theatre. I'd change the initial and continuing training program to suit this role. I'd take the security responsibility/requirement away from all other CAF elements wholesale.
A complete re-branding of the MP is in fact the easy button and is the only option that makes sense. Poaching PYs from the CA, RCN, or RCAF, and or a contracted or civil only solution are simply not viable (deployable, armed, CoC control, cost).