Calling the scenario a taxpayer subsidized home is more than a little misleading.  It makes it appears as though Fildebrandt is renting out a government residence.  In reality he rents accommodation via a private transaction and files an expense claim guided by the rules for all MLAs.

The real question that needs to be answered is whether his expense claim is reflective of his time spent in Edmonton on government business?  If it isn't then he needs to repay the appropriate amount.

The fact that he is able to sublet the apartment is secondary.  No different than an MLA who chooses to buy a home and expenses a portion of the mortgage.  Only to later sell that home for more than the cost.  Or even worse the MLA who is frequently absent from the Legislature sessions but still claims the maximum allowance.