So, I'll just claim that anyone who can't save at least €40,000 annually on a monthly net income of €6,800 simply doesn't know how to manage money. In this case, there are even bonuses added, so let's say €45,000 to €50,000 should definitely be well within the realm of possibility. I don't know whether, under these conditions, one shouldn't reconsider their consumption behavior instead of begging their own parents for money for the incidental costs. To be honest, I would be way too proud for that. 0% financing for kitchens and cars is discouraged everywhere ("then you just can't afford it"), but suddenly with a significantly higher investment, it's suddenly legitimate. No, this model is not for me either. :)
You can only reach the €40,000 if you don't make any unscheduled purchases and also don't take vacations. Or if you are significantly below the cost of living allowance.
With 2 adults and 1 child, that would already be €2,350 per month. If you still have fixed costs of, say, €1,200 per month for rent, insurance, etc., then €3,250 remain. €39,000 saved per year. With increasing salary, you simply treat yourself more. It actually only works if you live like you have significantly less income. Those who manage that might achieve it. But that's the minority. People say it's that simple. I now earn €4,000 net. Next year €5,000. Then I'll just save €1,000 more... Usually that doesn't work.