As I have already told the committee, the department did not study the impact of TFSAs on Canadians' savings rate.
That said, a vehicle like the TFSA offers a variety of potential economic benefits. For instance, it reduces a number of imbalances by allowing for a better economic distribution in terms of the decision to consume now versus later.
The TFSA was designed to give people more choice in the existing financial environment, which included the RRSP. For example, low-income individuals who may have had less incentive to invest in an RRSP now have much more reason to put their savings in a TFSA. The same is true of seniors. So the TFSA's ability to complement existing savings vehicles is a key factor. The TFSA doesn't add to what was already available, but neither is it redundant. Instead, it complements what already exists.