Hear a lot, Say a lot

I hear a lot 
And I say a lot 
Few ever look for me 
And even fewer ever hear me I hide in plain sight 
Whether its day or night 
To help is all I want 
But most like to bend me 
And as if they had a wand 
Never again shall anyone find me 
They do this to control 
Without realizing the high price of a soul 
But when I’m least expected 
They’d rather be protected 
For there shall be no place to hide 
What am I?

Politicians

There is a party of 100 high-powered politicians. All of them are either honest or liars. 
You walk in knowing two things: 
- At least one of them is honest. 
- If you take any two politicians, at least one of them is a liar. 
From this information, can you know how many are liars and how many are honest?

Measured

I'm measured in temperature and time, but have neither. What am I?

Loose Ends

You have a bag with 'N' strings in it. You randomly grab two ends and tie them together until there are no more loose ends. In the end, what is the expected number of loops (strings tied to their own end)?