Arbeitstier is a fantastic German compound noun, combining Arbeit (work) and Tier (animal). It literally translates to "work animal" and is a common slang term for a "workaholic".
In the song, Namika uses this word to describe the life she feels pressured to live: a "fifty-hour-week work animal." This single, evocative word perfectly captures the song's theme of questioning a life measured only by work and statistics, and instead searching for the things that you can't count.
Have you ever felt like your life is just a list of numbers? Namika gets it. In "Alles Was Zählt," she runs through the stats of a typical life: an 81-year lifespan, 50-hour work weeks, 1.5 kids, and a salary of €45,000. It's a life perfectly measured out, but she asks, "Ist das alles, was zählt?" (Is that all that matters?). She feels completely disconnected from this checklist, admitting she's never been good with numbers anyway.
Instead of finding meaning in data, she finds it in a person. The whole time this perfectly calculated day is rushing by, she's thinking, "Merk' ich, wie sehr du mir fehlst" (I notice how much I miss you). She even tries searching for "meaning" online, only for Amazon to suggest a book! The song's big idea is simple and powerful: "Ich glaub', alles, was zählt / Das kann man nicht zählen" (I believe, everything that matters / You can't count it). It's a great reminder that love, connection, and feeling are the things that give life value, not the numbers on a smartwatch or a bank statement.