Actually, it's not - ask any business that's taken funding, borrowed to invest, or even run an overdraft as part of their low season. Spending less than or equal to revenues is one way to run a business, especially a small business that you only intend to grow incrementally (if at all). Borrowing to invest for faster growth is a very rational way to run a business in many situations (market opportunity, large personal vision etc).

Again, I'm just addressing the business analogy - here's my politics disclaimer http://news.ycombinator.com/item?id=2822770