Muteki Shounin no Isekai Nariagari Monogatari ~Gendai no Seihin wo Jizai ni Toriyoseru Sukiru ga Aru Node Isekai de wa Rakushoudesu~ - Vol. 2 Ch. 5

[elhessan]

Wonder if tipping culture is a thing in their world XD; It's on them for giving him silver bars and not some kinda bank account

Even if the earth is different, I don't think another earth would pay in bars instead of coins. I mean if you trade materials that'd be barter system. So no, it's just him who doesn't have common sense.