So, here's the thing: when you earn more money, you don't necessarily jump up to the next tax bracket entirely. It's more like, your income gets sliced and diced into different chunks, each of which is taxed at a different rate. It's kind of like ordering a pizza with multiple toppings - each topping has its own price, and you pay for each one separately.
For example, let's say you're single and you earn $50,000 per year. You might think you're in a higher tax bracket than you actually are, because only the amount you earn above a certain threshold gets taxed at that higher rate. It's like a game of Tetris - each block of income fits into a specific space, and you pay taxes on each one accordingly.