I agree with this article, and would add one potential change that could have multiple benefits.

How about putting the capital gains exemption for primary residence on an escalating scale. I know folks who make a living buying dumps, renovating, and flipping them for a healthy tax-free profit. This works great as long as prices keep rising. Treating a first year sale at a regular 50% inclusion rate and then reducing it by 5-10% per year residence would close this unfair loophole, reduce real estate speculation (and inflation) and raise some revenue in a way that is both fair and does not reduce business investment.