Overall, as real estate investors and marketers, I believe this is good stuff. For years, economists have been telling us there are 2 problems in the housing industry 1. not enough supply (especially for first time buyers) and 2. potential buyers are struggling to build down payments thus leaving them as renters long after they should be able to purchase homes.
Will this cause prices to increase? Probably. Anytime there's more money that occurs. But the overall benefits to the economy for homeownership vs. renters, in my opinion, is worth the trade-off.
Not so sure about the rent collusion part of the argument. I'd say that says more about lack of supply than price fixing. But that said, I also wouldn't be surprised if it is occurring in some small/insular markets.
As a couple of other folks commenting suggested, I totally support the point that these efforts should be focused on smaller homes for first time (or senior) needs. There have been some great studies pointing out how new home building has doubled in size from the previous post-WWII US housing boom. My parents owned a 1200 sqft (cool) ranch with 3 beds/2baths when I was a tyke. Great house! We need to build more of those again.