Let's get away from this xenophobic tangent and back to pondering defence capability in a 3.5% funding model.
There is no government policy endorsing expeditionary fighter wings. There is published government policy requiring the capability for sustaining an expeditionary brigade.
Details of national commitments and NATO's capability packages are described through various documents with a lot of information in the unclassified domain. You can fill in more details by connecting dots from government policy documents, like SSE which committed the CA to being capable fielding brigades and which commited to being capable of Canada taking the role of frame work nation for a MN mission (all during the era of only 1.3% GDP funding).
So, if Canada is providing just a brigade, that brigade needs to meet all the NATO capability expectations ... but also, we have learned anything we deploy needs some higher level enablers (combat support and combat service support) which may or may not be declared activities. If Canada puts a battlegroup into a theatre, we need to put some brigade capabilities there too (and sometimes some Division capabilities as well). If Canada puts a brigade into a theatre, we need to put some division and corps capabilities there too. If Canada wants to be a framework nation, it needs to sustain at least one manoeuvre brigade in theatre as well as a plurality of the division enablers and also some corps/theatre assets for national support.
While the RCAF could commit everything in the shop window on any given day to deliver its core mission in defence of Canada at home, sustainable expeditionary capabilities need a substantially larger force at home preparing. If Canada wants to sustain a Canadian brigade within a Canadian framework division, then CA needs a robust division to sustain that.
NATO would be foolish not to leverage all the potential at its disposal, including resources that arrive after D-Day when there will be holes that need to be plugged, penetrations that need to be countered, forces that need to be relieved, or opportunities that need to be exploited.