The promises from the candidates are a flying... of course most of it is totally meaningless. I would guess that nearly 100% of presidential candidate's promises fail to come to pass.
Net result... even if Obama wins, the country won't become a socialist state. Likewise, McCain won't be able to balance the budget and cut taxes while providing increased spending on energy and such. My bet... neither will be able to pass their health care reform bills, etc.
They are both in the Senate right now. If these things(health care, taxes, etc) were so critical, how come they haven't already submitted the bill to the congress?
Answer.. they know they won't pass... yet they can promise them anyway.