Moscow - More than 180 000 Russians have signed an online petition to President Vladimir Putin calling for the resignation of Prime Minister Dmitry Medvedev over his recent comments on teachers' pay.The petition first posted on the website Change.org on Thursday came after the premier advised a low-paid lecturer to go into business if he wanted to make money.Medvedev's comments - seen as out-of-touch and uncaring - unleashed a torrent of criticism in the press and on social media."The cabinet should be led by a person who is competent, educated and cares about the country," wrote the petition's author, Alexander Li."We are seeing the opposite right now."The Duma, the lower house of Russia's parliament, is obliged to debate any petition that gets 100 000 signatures.At a youth education forum on Tuesday, Medvedev was asked by a university lecturer from the impoverished Dagestan region why teachers receive only around $230 per month, while police are significantly better paid."There's no need to compare," Medvedev said. "The issue is what you choose in life."Teaching, he said, "is a vocation. If you want to make money, there are a bunch of great places where you can do that quicker and better in business. And you didn't go into business."Medvedev - who served as president from 2008 to 2012 between Putin's presidential terms - added that a "modern energetic teacher" should be able to find ways to "learn something extra."Medvedev, who lectured at the law faculty of Saint Petersburg State University in the 1990s, also cited himself as an example of a teacher who succeeded in making a living."I just gave a lot of lectures, held seminars," he said. "Overall I was able to make ends meet."Official statistics show the average monthly salary in Russia is around $566. Teachers make an average around $488 per month but the figure varies greatly depending on the region.In Dagestan, teachers earn a monthly average of $274 Kommersant daily reported.'Hang in there'"The prime minister's impressions are completely understandable," said a wry editorial in tabloid Moskovsky Komsomolets."We all know very well of government officials who successfully manage to combine their main job with business, including big business."Novaya Gazeta lashed out at the premier over his remarks."Cynicism cannot be at the foundation of the state's domestic policy. That usually ends badly for the state and the bureaucrats," it said.Kremlin spokesperson Dmitry Peskov declined to comment on the petition.Other Russian officials have enraged teachers with insensitive comments about their low salaries.Last year a local lawmaker in the city of Yekaterinburg advised female teachers to find themselves wealthy husbands to ensure their livelihoods.In May, Medvedev once again sparked public ire after telling a group of pensioners: "There's no money, but hang in there."The phrase has since gone viral.