I believe the term miner is a misnomer. I believe the amount of new currency is fixed by the algorithm and is halved each year and will eventually stop. At that point, people can then 'split' the currency, like stock, to make transactions more manageable. This avoids 'hyperinflation'. As crazy as it sounds, it would work miracles if our country ran on it because the ability to 'print' money is what is sending us on the road to doom. (Just look at Venezuela)
I believe the miners are validating and moving the transactions around, but its not like some guy wakes up in the morning and says 'look, i Just found a coin, I'm $1,300 richer!'. If that were the case, I'd think you'd see this mad dash of AWS and every one elses hardware being crushed as people look to mine more and thus the value would drop and faith would be lost.
They don't actually 'mine' more currency, they are really just electronic transfer agents. Sort of like how peer to peer file sharing works, where everyone's machine makes the transfers faster, but the original content only came from one place. In the case of bitcoin, that one place is a fixed algorithm with a fixed amount of new coins per year and that amount halves each year until zero.