The term "privileges" is surprisingly tricky because there's been a language shift happen over the years.
"Privileges" used to be interlinked to the concept of "rights".
Let me show you what I mean. Here's the basic equal protection clause from the California Constitution:
-----
A citizen or class of citizens may not be granted privileges or immunities not granted on the same terms to all citizens. Privileges or immunities granted by the Legislature may be altered or revoked.
Source:
http://leginfo.ca.gov/.const/.article_1
-----
I'm not sure the exact year that entered the state constitution but it is very old. It wasn't in the original Calif constitution of 1849:
http://www.ss.ca.gov/archives/level3_const1849txt.html
...but if you look at THAT document, obvious civil rights are described as "privileges" several times. As an example:
-----
Sec. 5. The privilege of the writ of habeas corpus shall not be suspended, unless when, in cases of rebellion or invasion, the public safety may require its suspension.
-----
Compare this with the opening paragraph of the 14th Amendment of 1868, which is probably a bit older than the California equal protection provision:
-----
Section 1. All persons born or naturalized in the United States, and subject to the jurisdiction thereof, are citizens of the United States and of the State wherein they reside. No State shall make or enforce any law which shall abridge the privileges or immunities of citizens of the United States; nor shall any State deprive any person of life, liberty, or property, without due process of law; nor deny to any person within its jurisdiction the equal protection of the laws.
-----
Finally, let me show you the 1856 US Supreme Court case of Dred Scott, which outlines a series of civil rights (and argues that African-Americans don't have them, but that's immaterial to the use of the term "privileges and immunities"):
-----
For if they were so received, and entitled to the privileges and immunities of citizens, it would exempt them [blacks] from the operation of the special laws and from the police regulations which they considered to be necessary for their own safety. It would give to persons of the negro race, who were recognized as citizens in any one State of the Union, the right to enter every other State whenever they pleased, singly or in companies, without pass or passport, and without obstruction, to sojourn there as long as they pleased, to go where they pleased at every hour of the day or night without molestation, unless they committed some violation of law for which a white man would be punished; and it would give them the full liberty of speech in public and in private upon all subjects upon which its own citizens might speak; to hold public meetings upon political affairs, and to keep and carry arms wherever they went. [emphasis added]
-----
So we've got all sorts of references from 1849 through 1868 (and many more in each direction not mentioned here) in which the word "privileges" is linked to "the traditional civil rights of free Englishmen" or something pretty danged similar. Look at the Dred Scott reference: a right to free travel without pass or passport? Where is that in the Bill Of Rights? It's not. Civil rights were understood to encompass far more than what was written down.
If I were a very suspicious individual, I'd say that the language shift of the word "privilege" is deliberate, a way to negate all sorts of personal rights references from the 19th century.
But that would be one hell of a conspiracy.
Then again...it seems to hve started with the US Supreme Court pretending not to know what the "privileges and immunities" of the 14th Amendment are. A horrible example of this (the worst, in my opinion) is Cruikshank:
http://laws.findlaw.com/us/92/542.html
...but then Williams sucks too:
http://caselaw.lp.findlaw.com/scripts/getcase.pl?navby=search&court=US&case=/us/170/213.html
...and the infamously twisted Plessy v. Ferguson:
http://www.historycentral.com/documents/PlesseyvsFerguson.html
(Of the three I consider Cruikshank the most evil, with at least half a dozen vying for the #2 spot between 1870 and 1900.)
So it's possible the legal situation changed the language, either deliberately or by simply abusing the term for too long.