He doesn't have the authority to pay them anymore.
WWII memorial was built >90% on private funds, and its maintenance is 100% paid by its trust fund
therefore - it costs zero dollars to maintain.
What the hell is there to maintain that is essential to allowing someone to walk up to a marble post and read
There is no staff, only patrol by the park police, which will STILL BE WORKING.
They are spending money to barricade off an exhibit for NOTHING.
No shite. He doesn't have the authority to pay them anymore.