Here are the options:
(A) the current process, where applications are randomly selected who have to prove what they wrote on the form
(B) you would let case workers make the call if people should be requested proof. This opens the doors to discrimination based on nationality, race, social situation,...
(C) Don't do any of this and simply believe everything that an applicant writes in their application.
So what would you like IRCC to do? (C) clearly isn't an option.
Again, I get the frustration, but I can't see what they can do differently.
There is another option, and it is the option which is actually employed: screening applications utilizing triage criteria (identified
risk indicators) and standard assessment tools (such as cross-checking information in the application itself). Typically (at the least for many years, and probably still, even though the precise procedures are not public information, so this is not certain), the applicant's submissions are screened against triage criteria at least three times:
-- once by the CPC-Sydney office, and
-- again by a processing agent in the local office in preparation for the interview, and
-- again in the course of the interview.
(Last known version of the File Requirements Checklist revealed to the public, which outlines this process, dates from 2012, but it is very likely the current process at least roughly follows a similar outline if not largely the same FRC.)
This option includes required-information in the application that goes well beyond the scope of qualifying requirements, which information allows IRCC to evaluate the accuracy of the qualifying information in context.
Work history is the obvious example. There is no employment qualifying requirement. There is no answer to the work history questions which will disqualify an applicant except an answer which constitutes a material misrepresentation. This information is required precisely for the purpose of using it to screen the specific qualifying requirement information.
Even the travel history itself, submitted as part of the presence-calculation, is structured to facilitate verification through other sources. (It is not enough for an applicant to declare he was present 1095 days; actual dates of exit and entry are required, and these are checked in various ways.)
Applicants' declarations as to prohibitions are always subject to verification by RCMP and CSIS background checks.
Applicant's address history may be researched in GCMS for suspect postal codes.
As noted in depth elsewhere, IRCC can (and apparently fairly often does) research open sources such as those on the Internet (LinkedIn is among the most noted) to check an applicant's information.
Then there is the interview, and most interviewers are trained to identify signs an individual is not being entirely forthright let alone overtly dishonest.
In other words, the current application form and procedure incorporates multi-layered verification mechanisms.
All of which is standard operating procedure for decision-making of this sort.
The PPQ-QAE can (and probably is intended to) serve two purposes:
-- spot-checking individual applicants, to interdict some instances of fraud, and
-- collecting information which can be used (hopefully) to evaluate the efficacy of currently employed triage criteria (the risk indicators) and determine if other criteria would be better, or to identify other means of interdicting fraud
In any event, it would be a mistake for those who do not get PPQ-QAE to think that IRCC does not employ a range of tools to verify the information they have submitted.