The maiden voyage next January of the 250,800-ton cruise ship, Icon of the Seas, with 20 decks of candy-colored amenities, has sold out. The Cruise Lines International Association predicts the industry’s 2023 passenger volume should exceed 2019 levels. Cruises, after going over a financial cliff during COVID, are back! And so is the credit card debt that pays for cruises. Travel in the form of hotels, airline tickets and cruises, and retail sales of everything from household appliances and glassware to restaurants – these are just some of the ways Americans are continuing a post-COVID spending spree fueled by more than a year of rock-bottom unemployment. Consumers racked up $45 billion more credit card debt in the second quarter, pushing…