I understand your point. But I also feel that it needs to be taken in the wider context that our consumerist lifestyles were manufactured by those same corporations in order to sell more stuff. A good article about this. The individual can always try to consume as little as possible, but to truly break this vicious cycle at the societal scale, drastic measures would have to be taken in order to limit advertising (which is quite literally just propaganda to convince the masses to consume more) and other forces perpetuating the current situation. People can live without consumer capitalism, most corporations cannot. That's why they're hell bent on keeping the populace thirsty for their products through whatever means necessary.

The companies selling you junk are using psychology to make you buy their products. They have boiled down what makes you consume more, and what doesn't to a science.

You are bombarded 24/7 with ads and pressured to buy shit you don't need all the time so that the profits keep growing. This is 100% the corporations' fault

This is why nowadays, you see the same budget for marketing as the development of a product or service.

Remove the ads everywhere, and you will see consumption decrease.