It's a known fact that more money is wasted by our government than one could ever imagine (see article). In contrast, the Bible speaks of stewards and stewardship (see here).
In the New Testament, a steward was a manger of the financial affairs of a household (see here). It was required for a steward to be found faithful in executing his duties (1 Corinthians 4:1-2).
With the above thoughts in mind, here is a good common sense article on how "not" to waste money.