Because I’m getting a service in exchange while losing nothing of value. Why are you giving your address at the post office? Your name to the bank teller?
You think the government, the entity that already controls all of your data and can sway public opinion by simply “teaming up” with ms media already, needs Facebook data to ruin your country?
If you are afraid of corrupt governments you might aswell go live in the woods.
How about China tracking where a dissenting Chinese ex-patriate is?
Also, did you read your own fucking comment? You asked why my government needs help from corporations to sway public opinion - my response simply clarified that foreign governments do.
Just look at what Russia did in 2016 as an example.
You don't need to give Facebook information about your relationship with your friends and family members, your home address and location all the time. Just look at the information it collects from the iOS appstore, most of those data points aren't needed to provide you the service at all. Its like giving the post office the list of people you have been in a relationship with just because they ask for it.