DNSSEC is top-down securing chain, DNSCrypt bottom-up. Each has their pros and cons. Relying on your government to keep you secure can be a valuable factor, depending on your threat model.
Introducing any outside actors at all objectively diminishes the security of the whole model by becoming another link in the chain, even if that link isn't necessarily the weakest (and I certainly believe it would be, because both DNSSEC and the public Certificate Authority industry are object lessons for the abject failure of highly centralized global, government-wide, or even just company-wide security), but simply increasing any of the surface area is enough to decrease the security of the system.