Your friend points to the wages earned by your economics professor and her teaching assistant (TA) as an example of income inequality. Your tenured professor earns $120,000 , drives a BMW, and vacations in Europe, whereas your TA earns $10,000 per year, rides a bike, and vacations at his mom's house. Because they both teach for a living, your friend argues that this income inequality is not just. Which reply uses the economic life cycle to respond to your friend's argument? Your professor has many more responsibilities than your TA and is, therefore, paid more. Your professor and TA earn different amounts now but they will have similar earnings over the course of their lives. Your professor was once a TA, and your TA will one day make better money. Older workers typically have more expenses than younger workers due to the high cost of healthcare and other costs that occur later in the life cycle. The differences in wages occur because older workers need more money than younger workers. Your professor has more bargaining power than your TA and, therefore, has higher earnings.