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.