The Bankruptcy Code treats insiders with increased scrutiny, from longer preference periods to rigorous equitable subordination principles, denial of chapter 7 trustee voting rights, disqualification in some cases of votes on a cram-down chapter 11 plan, and restrictions on postpetition key-employee compensation packages. The treatment of claims by insiders for prebankruptcy services is no exception to this general policy: section 502(b)(4) disallows insider claims for services to the extent the claim exceeds the "reasonable value" of such services.