They should be treated like other immigrants. If there are no quotas on spousal sponsorship, then there should not be a quota on parents and grandparents.
Again, as I mentioned earlier, it is not just about lifting the quota; you have to look at the requirements as well. If the requirements remain unchanged, even if you increase the quota three times, you will still get the same number because people are simply not applying because of the very restrictive requirements of MNI—at LICO plus 30%—plus the 20-year sponsorship period, plus the three-year income tax requirement. All those things make it difficult for people to qualify as parents and grandparents.