Final answer:
Alex lacks discretionary income, the funds available for spending after necessities and taxes. Although he has disposable income and savings, the potential job insecurity leads him to prioritize saving over making large purchases like buying a house.
Step-by-step explanation:
Alex lacks discretionary income. Discretionary income is the amount of an individual's income that is left for spending, investing, or saving after taxes and personal necessities (like food, shelter, and clothing) are taken care of. Alex has a job that pays well, suggesting that he likely has disposable income enough to cover his taxes and necessities. However, due to the uncertainty regarding his job security and the potential for layoffs, Alex has chosen not to purchase a house. This decision indicates that while Alex has disposable income, he is hesitant to spend on non-essential items or make significant financial commitments until he is certain about his employment status. This hesitation is due to the potential need to use his savings to cover living expenses in the event of unemployment, hence showing a lack of discretionary income that he feels comfortable using for non-essential purchases.