Apparently USFK has a bunch of unspent money provided by the ROK government:

The U.S. military has left unspent nearly 68 billion won, about $60 million, in South Korean funds provided over the past six years as part of defense burden-sharing agreements, according to data released this week by a South Korean lawmaker.
The unused funds amount to $7.4 million in 2014, $9.3 million in 2015, $4.8 million in 2016, $12.4 million in 2017, $17.5 million in 2018 and $6.7 million in 2019, according to the data provided by Rep. Jeon Hae-cheol of the ruling Democratic Party. (…….)
The figures — about 12.5% of the total for all six years — also gave insight into U.S. priorities for the South Korean funds. All the money allocated for local labor was used. Most of the unspent funds were earmarked for military facilities improvement and logistics support.
U.S. Forces Korea said it was working with the Ministry of National Defense to reconcile former Special Measures Agreement contributions.
“A significant portion of these funds are accounted as in-kind contributions from [South Korea] and, thus, not fully visible to USFK,” the command’s public affairs office told Stars and Stripes on Wednesday.
Stars & Stripes
You can read more at the link, but it appears the funds are likely what is leftover from construction projects that were Korean funded and the USFK bean counters may not have had visibility of. Regardless this hasn’t stopped the Korean lawmakers from saying this proves USFK does not need more funding.










