Yes I agree that wanting more money can result in frustration as in Germany such salaries are not that common outside of management positions or specific companies, but I have some plans to fulfill - buying a Porsche; travelling the world; opening an NPO in a developing country, employing literate and teaching underprivileged, etc..
With the pennies that I'm earning, I wont be able to save as much, wont be able to retire as early as I would like to and, most importantly, the impact of final initiative won't be that high. So for me it is important that I earn huge..anyway, it's a choice of thinking, I'm happy with my life even now, just not quenched with the money I have..