It costs money to compensate settlers for the settlement wealth that is destroyed. One reason why phased withdrawal - partial withdrawal is accurate policy. It is also obvious that lacking a peace partner - Hamas has said no and Fatah was either unable or (given Israeli policy) unwilling to deliver Road Map requirements (it is now no longer able to be a partner) - the only progress possible is unilateral withdrawal. Full withdrawal to 67 borders is unaffordable in the short term (without the international finance which would only come with a peace settlement) and would in any case, appear to reward Palestinians for NOT being peace partners. And lets note the UN Resolution requirement, withdrawal to agreed borders based on a negotiated peace. Partial withdrawal is more affordable and more in accord with the UN.
Death toll in Ankara blasts rises to 86 (AP)
from the article: The ashes on the prophets' eyes