Park wants Lee's help to make good on her campaign pledges to improve the livelihoods of South Koreans, Park's spokeswoman, Cho Yoon-sun said.
"President-elect Park Geun-hye in particular stressed the budget for the people," Cho said. "She asked the president for his cooperation in passing the budget for the most pressing issue of [improving] the people's lives."
Park's proposal would increase next year's budget by $5.61 billion to fund welfare projects, Yonhap News Agency reported.
Cho said Lee had agreed to "actively cooperate."