Sure, but you can avoid lifestyle inflation while still knowing your worth. At €9,000 / month (> €50 / hr), 2+ hours spent trying to save €100 just isn't the best use of your time.
That's not really how it works though, it's a monthly salary and you aren't actually paid more if you spend more time doing work. If anything the contrary works: if I've spent an hour taking a dump at work, then I've just been paid 50 euros for taking a shit