This was released by the CPC, not the Liberals.     As always, the CPC assume that the person reading their release will just accept it without thinking.    The figure ($4K) is only one part of the expense - but they are trying to spin it as a contrast to Butts and Telford.    In reality, the costs are not only higher (at least 7 times), the motivations for Ambrose to move into Stornaway early (forcing an lease termination penalty) are all about entitlement.   So instead of contrasting behaviour, the CPC have managed to show similarities.

Personally, it wouldn't be such a big deal except for the CPC's faux outrage at PMO expenses (after running the largest, most expensive PMO in Canadian history).