On the eve of the Davos conference, Pope Francis warned the wealthy delegates and the economic elites of the world and cautioned them not to be deaf and blind to the cry of the poor and to discontinue doing things that produce inequality in this world.

The pope's call was issued on Wednesday at the conference. But it was in contrast to Joe Biden's state of mind. Being a person who always wants to crack jokes, the U.S. Vice-President is apparently in a good mood when he made a wisecrack at President Obama.

While speaking at the World Economic Forum on Wednesday, he said his boss has not allowed him to go to Davos until now. "I've really resented the hell out of the fact Barack wouldn't let me come until tonight," says Biden in his speech. But he quickly added that he is only joking about it.

It appears that the pope is more serious about the situation than the U.S. vice president. He stated that current technologies have the potential to make robots with artificial intelligence as a substitute for humans. The pope urged that replacing humans with "soulless machines" should not be allowed.

"To all of you I appeal once more: 'Do not forget the poor!'", he urged the delegates of the Davos conference.

Much more than being a jokester, Biden has been frequenting almost every conference that was held by the 45-year-old World Economic Forum. In his speech, he focused on the theme of the meeting - the Fourth Industrial Revolution.

Turning more serious, he said he hopes that the conference would have more winners than losers. This statement was directed to the delegates who are comprised of 2,400 business leaders among others. He urged these business leaders to be serious about their responsibilities towards their workers and shareholders.