Your idea has been suggested before I believe we have some methods that would result in a mass resurrection of people, perhaps even multiple at once however there are some extremely major issues with it.
1. A great number of people (I can get statistics for you if you are interested) resurrect with 'resurrection sickness.' What causes it appears to be a combination of factors including the long time in death and pre-death trauma. The issue is that it is a long lasting medical condition which requires active treatment. Some people become depressed, some have violent outbursts, hallucinatory episodes, and some are even catatonic. They are (mostly, so far) curable, but it takes time (anything from weeks to months) and sometimes the intervention of people with mental abilities of which we have very few. We do not have the resources at present to handle a flood of hundreds of people with the sickness.
2. Our food and other supplies are finite. So far we have been able to increase our food production to keep up with the resurrection rate (right now I and the clerks are working on additional avenues for food production as our population is starting to outpace it again) but again if the resurrection rate increased significantly or we suddenly resurrected more, even a few hundred, we would all starve in very short order.