【物极必反】〖wù jí bì fn〗[Things will develop in the opposite direction when they become extreme; A thing turns into its opposite if pushed too far; Once a certain limit is reached, a change in the opposite direction is inevitable; Things always reverse themselves after reaching]

物力维艰众雇工，

极奸巨恶剥削凶。

必得寸利加班点，

反道败德肥富翁。