Why do people still pay for music

BECAUSE OF DARUDE- SANDSTORM! Lol.

what's that song called?

naruto- ninjastorm!

Due to the increasing advancement of the Internet, it's become easier and easier to download music for free.
Despite this, you still see songs selling over a million downloads on iTunes charged at near £1 per copy when there are many websites that offer these same songs free of charge. If you think about that, someone may have a 2000 song library on their phone so would have "wasted" around £2000 that could have been used for something better like paying their bills.

I would like to know who and why you pay for your music if you do so

Just a dad seems like a morally upright dick.

We download for free because can.

I'll stream movies because I can.

At the end of the day, it isn't the most heinous crime

It is still a crime...

they make money from a lot more things than just selling tracks. They get payed thousands just to show up to certain events.

A lot of them do. Thats how they establish themselves. See "no copyright sounds on" youtube. Loads of artists giving away music for free.

Out of interest, what would happen to the music industry if everyone was able to consume it for free?

If people paid to come and see my photographs, I'd be happy to give them a digital copy for their memory stick to take away - provided of course they didn't try and claim it was their photograph and make money off it (a problem I imagine the music industry wouldn't have very often). I'd even start by showing them to people for free, or letting them have a digital copy to print off themselves, because then they'll want to come and see them.
Similar situation to downloading and then coming to gigs/buying merch.

Additionally, if they wanted to take home a printed copy, then they'd pay to cover the production costs (plus a little bit in it for me for the trouble of getting that printed copy), similar to buying a physical CD with the booklet.

There would still be money. All industries have to deal with globalisation. For example the IT industry domestically has suffered due to out-sourcing. Domestic workers had to evolve and become more technical to keep being employable.

Did that involve domestic workers not being paid for their work?

Essentially yes. Those who did not learn new skills lost employment as anything that's not too complex could easily be out-sourced.

Perhaps I'm getting confused, but you seem to be advocating that artists retrain and become, say, plumbers to ensure that they get paid for their services.
Or do I have that wrong?