Well, certainly at the time when a low-income person is working, they are going to be required to make additional contributions to a payroll tax, to an investment that is not a very good investment for them. One of the primary beneficiaries will be the people who administer the guaranteed income supplement, because they will have to spend less money than they would have otherwise.
I think the remedy is in dealing with the GIS clawback because of the other benefits of modifying the clawback: both the freedom and not having to deal with the RRSPs versus the TFSAs so much.