Very important. You can afford better stuff in life. If you have a family and kids, they can get a better life too. You get to try more food, your travel options open up, you can afford more help for kids in tuition or give them extra classes to pursue their passion in music, arts or whatever. You can save time by getting a car or taking more grab. You can afford to upgrade yourself, take more expensive courses like a Masters, MBA, CFA and more. You can afford to take unpaid leave, sabbaticals even!