"Data points to facilitate many retirement-related financial decisions can be obtained by answering the following two questions ... [1] Does the household have sufficient non-risky assets to fund the present value of their future Essential Expenses (their self-selected 'needs') using assumptions consistent with purchase of these liabilities from an insurance company? ... [2] Does the household have sufficient risky assets to fund the present value of their future Discretionary Expenses (their 'wants') using reasonable assumptions?"