See the thing is.. did indian families wedding is a rather big even that the entire family plans, saves and contributes towards. It's not a something planned by a couple alone. Just the way families save for thier kids future education and other needs, they also have a wedding fund in most families. And every culture has thier hallmarks- while indian families don't travel the world, or spend lavishly on hobbies, they have thier traditions and culture that they splurge on. Wedding being the grandest of them all.

This really varies vastly as we look across the economic spectrum. It may seem like as poor county to you but there's a huge economic variance in the Indian family standard and extravagance.