The neccessities that it currently receives from Israel a result of Israel's blockade which requires it to let in certain things and maintain a certain standard of living. The moment the blockade is lifted Gazans are on their own. There will be no legal obligation on Israel to provide services. For example, sick Gazans rather than being able to go to Israel for FREE TOP QUALITY medical treatment, might not be able to and might have to go to to Egypt or other places in the world. Furthermore, once the seige is lifted, if Gazans are impoverished by Hamas policy it will no longer be Israel's issue. Lastly, israel will have increased military abilities should Rockets start coming out of Gaza as it will no longer be the "occupied" power by any stretch of the word. So as a proud Israel supporter, born there but now live abroad, so long as the security of Israeli's is guaranteed then sure lift the blockade but make sure the world understands the conditions by which it is lifted. notably, complete and utter apathy to Gaza and Gazans existence, unless rockets should come a flying then we will have bigger issues.
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from the article: Israel faces growing world pressure to lift Gaza blockade