Ionizing irradiation is already used a very great deal, at least in the US, to kill insect eggs and larvae in imported produce. It is not used more than it is,

Ionizing irradiation is already used a very great deal, at least in the US, to kill insect eggs and larvae in imported produce. It is not used more than it is, e.g. at high enough intensity to kill microbes, because that damages flavor and texture. So it is not, in fact, fear of radiation that prevents that use. Another reason, though, is that everybody knows meat packers would then completely abandon any pretense of sanitation, and all the meat they buy would have shit all over it. (Technically, the irradiation is mostly done before it crosses the US border.) Nobody knows what possibly-toxic chemicals that never occur in nature or in cooking are produced by intensely irradiating any particular foodstuff. Of course the mix would be different for every single species irradiated. So, everybody involved just hopes nobody will succeed in proving anything, is careful to ensure somebody else will be blamed if anybody ever does, and tries not to attract attention. The US DA and FDA help with this last.