The reason that the economy is defined in terms of transactions that involve an exchange of money is that such transactions can be quantified objectively. If no money is exchanged, then assigning a valuation to an activity is pure speculation. Of course, this doesn't stop bureaucratic number-crunchers from attempting to do so anyway (e.g. the inclusion of "owner-occupied implied rent" in CPI calculations) but it's not hard to see the slippery slope it creates. Assigning a name to something ("emotional labour") doesn't mean that it somehow becomes quantifiable in any tractable or objective manner.