As ludicrous as this idea is, let's suppose that our federal government does care deeply for us. Even if that were the case, it would still fail because a few bureaucrats in Washington simply cannot efficiently manage the lives of an entire nation.
So who would pay to protect your behind from possible bad, bad Islamic invasions (sadly we got no more commies to invade us)?
Who would pay for scientific research that does not give immediate returns? (or are we, just like with the Large Hadron Collider, let the scientific leadership return to Europe)?
There is no place in the world requiring a government that does not need something to pay for it, and that something is called taxes. If you don't want to pay them on the Federal level you will have to pay them on the State level, with one slight difference, there is no single state capable of stemming a mega project like the Federal government is and there is no State that will create an Army controlled by the Feds.
And only those two positions require more money than what is collected in taxes. The other 1/3 of the budget is financed by making debt.
So nobody can tell me that there are enough taxes collected, in fact, the last time it was so Clinton was Prezz and Gingrich the leader of the house. That is quite some time ago.