It will encourage people to sit on property as long as possible and refrain from sinking money into upgrades. (It yields incentives similar to rent controls.) This is a good policy only if you favour stagnation.
People already sit on properties. No one is downsizing these days, the boomers are preferring to hold on to the properties and live off the equity.
This would hurt the housing market value. Most of it is only being borne by people who already owned homes before the prices went nuts. Basically if you can't transfer capital from a already owned property you aren't getting into one.
My house was 167k when I bought it 7 years ago. Today it would be at least 300k, maybe towards 400k. I couldn't step into the market if I had to buy my house at todays rate. I couldn't upgrade if I wanted to without having owned a house at the lower rate. And this is a fairly depressed housing market in comparison to most the country.
The only people who win with the nonsensical housing market we have today are those who owned before prices went crazy and are selling for good, the banks, and the municipalities (and even then only if they are able to adjust to current rates).
It kills investment in this country. It kills population growth. It kills having children. It kills our youth having a future. It kills businesses from starting. People need to make that much more money to actually get ahead and most jobs can't afford to pay that amount.
We waste so much money going into housing, literally doing nothing except paying interest to the banks because magically the prices jumped. If prices were lower people would have more money to spend elsewhere, stimulating the economy, encouraging population growth, and making things better for society.
I also don't say this as a hypocrite. I own property bought before prices went nuts. I would technically lose if prices were to drop dramatically. But it is better for the nation and I am willing to make that sacrifice because of that.