From what I see.
Even though the government would know who qualifies, they are making low income people and those that use most of their resources to apply for this benefit.
This gives them lots of wiggle room to simply not have to payout as much money as they should.
Plus a fairly tight deadline for filing.
CRA knows our income, so they know who would qualify.
Most people in Ontario submit what their rent is in-order to qualify for Trillium benefit. So CRA knows that number, at least in Ontario.
Some other provinces have rent info, some do not. So at least in Ontario. This job could be done all in-house. That's a big part of the population and probably a big part of the potential payout.
Bottom line, government has not thought this out if their intent was to serve. Frankly they have created lots of a wiggle room and more importantly an opportunity to expand government, a lot of paper files to process. Yeah
Note, the group that is most likely to qualify for this benefit perhaps do not have a phone, or internet service .... as a lot of this applying is encouraged to be done on line or over the phone .... it furthers shows how they wish to wiggle. .... March 31, more wiggle. Maybe some of my thinking is out of date, everyone seems to have a phone with wifi options or a little data.