This part I bolded makes no sense. Residency status per tax rules is residency status for tax purposes only. For a citizen, it has no direct effect upon the ability to sponsor. "Losing" the residency status for tax purposes is irrelevant - and at any rate, gaming the rules by pretending to be in Canada (for tax purposes? doesn't make sense to me) could have potentially negative repercussions.
And overall a spousal sponsorship does not have a fixed income or job requirement, and I don't even know what is meant here by a 'means of support paper.'
IRCC can certainly determine whether the sponsor is in Canada or not. There's no good reason to 'hide' it for a citizen and potential negative consequences. On the contrary in this case residing with the spouse and informing IRCC may help with the application as they are (presumably) living together and supports the genuine nature of relationship.
I did not respond to you so i dont need to provide you whole supporting documents or satisfy you... i already responded to relevant person and she is canadian citizen understand better.