The IRS of course.

"Government, even in its best state, is but a necessary evil; in its worst state, an intolerable one." ~Paine

Depends on whether you are using turbotax or not like Tim Geithner was.

well we know it's not the Post Office...Obama even said so! 

OK.  I never heard of the FAA one, but I will certainly take Daiwa's word for it.  I think that's pretty sad that is all we can come up with.

That was a stupid claim, and sometimes you have to wonder if Obama even believes the nonsense he speaks.

Tell that to Obama, he was the one that brought it up. BTW, thanks for giving more proof of the facts. After so many years of service, the post office has yet to be efficient or even profitable, you gotta question why a Gov't with so much power, so much money has yet to correct this?

Just because you have the capibility or where-with-all, means you act rationally or logically.

The people who are responsible for stealing your money are efficient. IRS, military, and apparently some aviation program.

I don't care who is president. I'll take whoever lowers taxes the most.

QQminusS -

I assume "some aviation program" refers to my comment #1.

First, full disclosure: I am constitutionally sceptical of government's ability to do much of anything efficiently.  I am also a designated Aviation Medical Examiner (AME).

The FAA's Aviation Medical Certification Division is responsible for certifying the medical eligibility of all civilian pilots, commercial and private, as a matter of public safety.  In a sense, it is a public/private agency in that it uses private physician 'designees' who have voluntarily and at their own expense undergone specific training in aviation medicine, as its agents (AME's) who do the actual work in the trenches.  Unlike many (most?) agencies who's employees have a mindset geared toward personal job satisfaction rather than the needs of their 'customers,' the AMCD's staff mindset is geared toward getting and keeping pilots certified (and flying) as quickly and efficiently as possible, while assuring they are medically capable of exercising the responsibilities of piloting aircraft.  That mindset shows in everything they do.  And they do it in an environment of tight budgets.  No government agency is perfect, but this one comes closer than any I've encountered.

On another note, while our military does lots of things very well, efficiency has a different meaning in matters of war than the traditional economic meaning of the term, so including the military in a discussion of government 'efficiency' doesn't make a lot of sense.  Is there waste & abuse in the military?  Absolutely.  But military efficiency has to be measured by some formula incorporating lives harmed & lost, the value of which is inestimable, meaning that any assessment of military efficiency is necessarily qualitative.

The FDA is an excellent government program.

As Americans you are probably not aware of the tragedies that happened in other countries where such an oversight over drugs was traditionally missing well into the late 20th century.

The US military also seems very efficient.

Generally, the US government is very efficient indeed and needs little improvement. You should look at other countries to see what's possible and what you are already doing better. Comparing the US government to a non-existing ideal is futile.

My proposals for changes would be moving responsibility for education to the state level and reforming the postal service.

Everything else seems pretty OK to me.