Look, Mr. Bachrach, the committee can invite whomever they want to.
The CTA is a quasi-judicial, independent body that adjudicates complaints independently. It is really important that the government supports the work of the CTA but also avoids prejudging the outcomes of their decisions and does not appear to be dictating to the CTA how to decide on the complaints they have before them.
It is really important to respect the independence of the CTA, while supporting them in fulfilling their mandate.