Rep. Jang Dong-hyeok, second from left, leader of the main opposition People Power Party, speaks during a Supreme Council meeting held at the National Assembly in Seoul, Monday. Yonhap

The main opposition People Power Party (PPP) on Monday stepped up its criticism of a ruling party lawmaker's proposal to remodel old buses into housing for young people, calling it an irresponsible idea that mocks the public.

The criticism came as Rep. Hwang Hee of the ruling Democratic Party of Korea (DPK) faced backlash after floating the idea of converting discarded buses into short-term housing for young people near universities in a Facebook post, noting the use of houseboats in the Netherlands.

"Instead of telling young people to live in these discarded buses, we hope the DPK moves its own headquarters and lawmakers' offices into such buses," PPP leader Jang Dong-hyeok said during a meeting of the party's supreme council at the National Assembly.

"It is nothing more than a barrage of nonsense that ridicules young people and mocks the public," he added.