That's exactly why this is a good idea.
Pakistan suffers high casualties because it's soldiers aren't even equipped with basic gear that most modern armies use, and still uses cold war equipment that need to be replaced. Body armor and advanced Ballistic helmets are reserved for elite units, as are sights for the weapons that PA uses, night vision still hasn't been rolled out across the entire Pakistani infantry despite previous commitments to do so. Then you have a severe lack of communication devices, which each infantry soldier should be getting. IFV/AFV/MRAPs are also in dire need of purchase.
Also, down sizing could just mean not increasing the current numbers further, which PA has traditionally done every year to match the 1-3 ratio. However, if Pakistan can buy the items I've listed, especially body army, new advanced Ballistic helmets, and sights for infantry rifles, the average infantryman survival rate will increase dramatically.
At this point, Pakistan just cannot keep up by manpower alone. India is increasing its population too quickly to maintain a strategic and tactical balance in the medium to long term. The only chance Pakistan has is to increase its force multipliers, which means more technology.
PA also needs to make sure that it stamps out corruption within the army in the process. We've seen what happens when corruption is allowed to run rampant via Russia. My fear is that if Pakistan doesn't nip this in the bud, Pakistan's next conflict with India will be a one sided massacre.