Clark is hoping to get a big Christmas bonus, but his boss sends him a gift for a jelly subscription instead. Consumption is one of the components of aggregate demand, and future income can influence present consumption. Clark was planning to spend this income on a new swimming pool for the family and already spent some money on the deposit for the pool assuming he would get this bonus. He even notes that there isn’t enough money in the bank account to cover the check he wrote. His current consumption was based on an expectation of future income.
Thanks to Mandy Mandzik for the clip recommendation. Check out her working paper, All I Want for Christmas is an A on My Econ Final: A Holiday-Themed Review Class, for more Christmas-themed economics examples.