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Check out median starting salaries coming out of these programs. Even the most elite range from $55-90k annual. I am talking about Hopkins SAIS, Fletcher MALD, Georgetown MSFS, and Columbia SIPA. 
These numbers are abysmal when you consider the perceived prestige of the programs, the competitiveness to get in, and the (usually very significant) prior work experience of the entering class. Top-tier public and international affairs programs cannot compete on salary with even third-tier regional MBA programs.
I went for the intrinsic value and because it was a life-long dream, but I would advise all out there to be very careful about "just going" and to drive a hard bargain if you get in. Paying full or nearly-full tuition just isn't worth it for at least 80% of prospective applicants.   

Check here:
CIA's Graduate Studies program, and if you are low income, the Graduate Scholarship program ( https://www.cia.gov/careers/student-opportunities/graduate-students.html )
Pickering Fellowship: http://www.twc.edu/thomas-r-pickering-foreign-affairs-fellowship-program
Rangel Fellowship: http://www.rangelprogram.org/index.cfm?session.areaid=2&contentid=672&typeid=CBRIAP92223 
AFIO - https://www.afio.com/13_scholarships.htm
WID Horizons (if you are female) - http://wid.ndia.org/horizon/Pages/default.aspx
Lint Center - http://www.lintcenter.org/scholarships/
For internships:
State - https://careers.state.gov/intern/student-programs
CIA- https://www.cia.gov/careers/student-opportunities/graduate-students.html
DIA- http://www.dia.mil/Careers/Students.aspx 
NSA- https://www.intelligencecareers.gov/icstudents.html?Agency=NSA 
FBI- https://www.fbijobs.gov/students/honors-internship-program 
USAjobs - https://www.usajobs.gov/
Energy - http://orise.orau.gov/doescholars/
Homeland Security - https://www.dhs.gov/homeland-security-careers/students
US Marines Intelligence - http://www.hqmc.marines.mil/intelligence/StudentEmployment/Opportunities.aspx
National Reconnaisance Office - http://www.nro.gov/careers/summer.html
NGA - https://www.nga.mil/Careers/StudentOpp/Pages/default.aspx
Treasury - https://www.treasury.gov/careers/hq-careers/Pages/student-employment.aspx
Not to mention internships with defense contractors like Booz Allen.
Most/all of these jobs would make you eligible for for PSLF as well.
It is my humble opinion that you should go for SSP. In addition to what I mentioned above, Career Services and faculty/staff/felow students in the SSP will undoubtedly be able to tell you about other opportunities. Once you get to DC, the opportunities are endless. 
I hope this info is a blessing to you and please pass it on. 

Created an account just so I can chime in here because this is something I've heavily researched. Firstly, I highly advise you to read the PSLF FAQs from the actual federal government student aid website (link here). I'm starting grad school in the fall, but I'm hoping to work in the non-profit sector or the federal government after graduation, so naturally PSLF is something I hope to benefit from. I too am concerned that it might eventually get cut from the federal budget, but until that actually occurs, I'm planning on participating in this program. That doesn't mean I won't be applying for external scholarships or other forms of funding, but it's still in the back of my mind. 
@MAPLE90, those international organizations you mentioned DO NOT qualify under PSLF (see question 40 in the PSLF FAQs). I was heartbroken myself when I read that, but bear in mind that you qualify for PSLF after 120 payments made while working for a qualifying entity and those 120 payments don't need to be consecutive. In other words, you can work for a qualifying company for a few years and make progress towards loan forgiveness, then work for the UN for a bit, then go back to a qualifying company and your initial progress doesn't get lost--you just won't be progressing during your time at the UN or whatever int'l org you're hypothetically at. 
In regards to tax exemption, if you do manage to have your loans forgiven under PSLF, the forgiven amount IS NOT taxable income! See question 3 in the PSLF FAQs. Under your normal loan repayment programs (PAYE, REPAYE, ICR, etc), if you reach 20 or 25 years and your remaining debt is forgiven, that does get taxed. Check out this page for more details on that.