Anything built post-GD (which is going to be the vast majority of what you service) was likely touched by government subsidy in some fashion, whether grants, loans, or municipal bonds (tax-exempt, so effectively a subsidy). "Company towns" built before then were often subsidized, in effect, by companies not having to bear the financial burden of their many, many instances of illegal or rights-infringing behavior.

That's not considering your customers, who are likely also subsidized by the government in some fashion - if their jobs do not involve federal or state government contracts or supplying or servicing companies holding such contracts, they're almost certainly taking advantage of advantageous tax rebates or deductions.