Answer: Because government is the answer to everything.
An advocacy article in the Mountain Xpress concludes for you, citing a report by Duke University, not to be confused with Duke Energy Progress:
North Carolina’s ability to continue attracting companies in the solar industry, create jobs and promote economic development throughout the state is at risk unless policy makers act [to renew subsidies].
The article says North Carolina is first in “installed solar investment” in the South and fourth in the nation; in other words, welfare begets dependence. Oh, and the subsidies are creating jobs like crazy.