I can’t speak to Federal Agencies, but the Military snaps-to when they get a call from the Congressman’s office. I’ve personally been the investigating officer in two investigations, have provided evidence/information/assistance in a dozen more, and witnessed maybe another dozen or so from the sidelines. Only a few returned a major victory for the service member, most returned some changes in treatment/acceleration in processing/review of decisions (most with a favorable result), a few were unfounded or malicious and resulted in discipling for the service member.
It’s jokingly said in recruiting that you’re not doing your job until you’ve had at least one Congressional Investigation called on you. While that’s not really true, they happen often enough, and are always taken very seriously. Fortunately for recruiters, most investigations called on them are unfounded or malicious, usually by relatives of a new recruit whom don’t approve and believe the recruiter must have done something unethical to get little Johnny to join up. Unfortunately, there are just enough idiot recruiters out there to make such investigations popular with Congressmen, who get to play hero to little Johnny’s mom, hoping to get voter loyalty. Cynical much? Anyway, if this kind of investigation is founded, the recuiter get sacked, with, at a minimum, a ‘fault’ transfer to the nearest unit that needs a spare body. Sometimes much stronger measures are called for, and God help the unethical recruiter that gets an irate Congressman on his neck.
Enough about the special conditions of Congressoinal Investigations in recruiting. The kinds of investigations that I’ve seen return the most dramatic results in favor of the service member revolved around pay and medical benfits, especially disability amd medical discharge. It’s common that the military medical establshment grinds some poor bastard up in the gears, either denying the disability as ‘service related’, or just dropping the poor SOB on the VA’s hands without proper medical review and care. This is when, Before being discharged, but after all offical proceedures and appeals have been used, that a call to the Representative comes into it’s most effective play. No Representative is going to waste time following up on someone who hasn’t gone the whole route, or who hasn’t done their homework, but when all the ducks have been placed in a row, every “I” dotted, every “T” crossed, then the Congressional investigation is usefull. Too bad few people actually do it right.
Again, it’s all about persistance and respect. When the service member follows-through, the odds of a decision in their favor go way up. OTOH, I’ve seen service members fail to follow up, and thereby lose benefits, money, and other things that were their due by right and law.