Yes, they stated in their manifesto that they will save 30 billion by cutting corruption, and firing corrupt officials.
They will then spend 10 billion of that on speeding up land reform and providing training and support for new farmers.
And if you look at the rest of their promises w.r.t. millions of jobs, 1 million internships, 250 000 additional cops, 15 000 more teachers per year, 7 million EPWP opportunities, building rehab centers, etc, etc, the remaining 20 billion is not going to be close to enough.
Where did the DA say that only the money saved through corruption will be used to fund this stuff? They'll budget the money from somewhere else.