The idea is that those from disadvantaged poorer backgrounds have had enough to struggle with in their lives up until that point, thus making them work alongside their studies instead of giving them ~£270 a month extra is an unnecessary hardship. Plus, what if they can't find work? What if the work they find doesn't pay enough? Those who don't receive the grant may not have led a life of luxury, but they are deemed to have had a reasonably comfortable upbringing - therefore requiring them to work or their parents to live more economically is a reasonable compromise.
So basically because some people have had a harder start in life they should have an easier time at university?
I'm not saying that at all. What I am saying is that the grant money is spent in the same way as the money others got from working. Which at uni was a combination of accommodation, food and drink.There is zero evidence that those who receive grants go out and get wasted and have fun any more than those who do not receive them. In my experience, those who have received grants are more sensible with their money.
Depends entirely on the university. Like I said, it's not guaranteed.
I'm not suggesting that people with grant money went out drinking more.