expression, noun
money rules the world; rich man's world
Proverbial expression meaning that money is the most powerful force in society; often used with a cynical or resigned tone.
金の世の中だから、お金がないと何もできない。
Since money rules the world, you can't do anything without it.
彼はいつも「金の世の中だ」と言って、仕事に励んでいる。
He always says, 'It's a rich man's world,' and works hard.