Geoff Orazem at The Hill has put into words the thoughts that many small businesses have regarding the threat of a government shutdown:
Working with the government has always meant slim margins, delayed payment, and possible jail time if you make a mistake during the complex sales process. But it also meant a long term, stable revenue stream with a trustworthy client and that predictability encouraged many small businesses to focus on government, which in turn enabled them to grow develop innovative products for both the public and private sector.
However a government shutdown breaks that trust and predictable revenue stream, leading to lay-offs, delayed research and development, or even bankruptcy.
Emphasis ours. Read more at The Hill.