I wouldn't read too much into five-figure bribes, those are probably for tax purposes. This particular congressman's position more likely comes from his personal opinions and the types of people he golfs with.

In general donations (bribes) don't dictate political support for defense contractors. That support is a given, for two reasons. First, defense contractors are also large civilian employers. Second, contracts are a form of subsidy, to maintain what they call the "defense industrial base."