By David Lawder

(Reuters) -World Bank Group President Ajay Banga on Tuesday said proposed new contributions from wealthy countries combined with balance sheet changes could boost the bank's lending capacity by $100 billion to $125 billion over a decade.

Banga told a Council on Foreign Relations event that the contributions would come outside the bank's normal shareholding structure and regular country contributions to the International Development Association fund for the poorest countries.

They would include U.S. President Joe Biden's proposed $2.25 billion supplemental budget request for the World Bank, along with expected contributions from Germany, Japan, South Korea, Saudi Arabia and Nordic countries, he said.

"I believe that if all this goes through, including the U.S., we could raise somewhere between $100 billion and $125 billion of extra lending capacity in the bank, which is pretty good. Not enough, but good," Banga said.

The total increase he described would include measures now underway to stretch the bank's balance sheet, such as a leverage ratio increase agreed in April that would yield $50 billion in new lending over 10 years, a World Bank spokesperson said later.

The bank is also examining other ways to expand lending, including providing more loan guarantees, lending against callable capital that is pledged but not paid-in, and special bonds that can serve as hybrid capital.

MISSION SHIFT

Banga said he expected shareholders at the World Bank's annual meetings in Marrakech, Morocco, in October to formally adopt a new vision statement that expands its role beyond reducing poverty and promoting shared prosperity to incorporate global challenges such as climate, pandemics, food insecurity and fragility.

"I think the twin goals have to change to being the elimination of poverty. But on a livable planet," he said, adding that he expects support from all shareholders.

Banga said that he has not yet held any discussions with the United States and China regarding a general capital increase and changes to the bank's shareholding structure.

China, India and Brazil got larger shareholdings in the bank in a 2018 capital increase and would likely want more say in a future capital increase, Banga said.

The former MasterCard CEO, who took over the World Bank's top job in June, has said he wants to build a "better bank" - increasing its urgency, focusing it on high-impact, replicable projects and expanding beyond its anti-poverty mission - before seeking a general capital increase from shareholders.

He told the CFR event that he was impressed by the dedication and talents of the bank's staff, but its organizational structure was "dysfunctional," holding it back.

Asked about the legacy of his presidency, Banga said: "I'm going to fix the plumbing ... I want people to say when I'm gone, that I left the bank working much better than what I got it."

CAPITAL NEEDS

Banga said G20 countries will struggle to agree with an experts' report commissioned by the group that calls for a massive capital infusion into the World Bank and other multilateral development banks to help finance the $3 trillion in annual spending needed by 2030 for climate adaptation, resilience and mitigation.

But he said the bank's resources, even with moves to stretch its balance sheet, are woefully inadequate, with paid-in capital of just $22.6 billion for the World Bank's International Bank for Reconstruction and Development over its 78-year history.

"That is a pimple on a dimple on an ant's left cheek compared to what we need in the world," Banga said.

Banga said that deeper conversations were needed on the World Bank's future funding, but added that he would "not try and put an idealistic number out there" for the size of a future capital increase.