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Spending tends to rise inline with income if you are some combination of foolish, bored or unhappy. Most people are some or all of those things at least some of the time. In particular people safely ensconced in comfortable long-term, well paying office jobs tend to be bored and unhappy a lot of the time.

That can lead you to make poor decisions which provide short burst of happiness. No matter how large an income you have you will be able to get a mortgage, a car loan and credit card payments sufficient to entirely consume your paycheck. And if you do still wind up with extra cash why not put in a swimming pool/buy a boat/take an expensive vacation. That will cheer you up (for a while).

Stuff like a more expensive home, vehicles and boats are especially disastrous financially because they have ongoing costs in addition to the upfront expense. You pay a bunch of money now and then have to pay money for maintenance, insurance etc for as long as you own the thing.