A workplace is all about safety first, mainly because no one wants to have the arse sued off of them and so they think of every single scenario possible and then take measures to lower the risk of anything, anywhere ever going wrong. Which is really a fine idea but in practice fairly hopeless, we are human beings and if we can find something to hurt ourselves on we will or even find ways to use a perfectly safe object and turn it into a killing machine then we will do it. You still have to go to the safety workwear in Sydney shop to get all your protective gear before starting at the work site, you will need a nice protective hard hat, steel cap boots, reflective shirt and jacket and in some cases even the pants will need to be a really bright fluorescent yellow, orange or green. At least if you fall down a well they will be able to find you or your corpse anyway
All these items to make sure you are highly visible and that your toes are protected from heavy objects falling on them, too bad if it falls a bit higher, your foot will be broken but your toes will be fine. Then the hard hat is supposedly to save you should an object fall from a great height, which it won’t do but at least you will still have a face all in one piece for your funeral and they can have an open coffin if they wish. I think bosses have chosen the high visibility shirts and pants not for your safety but because they want to be able to have a head count at any given time and it is harder to slope off from work when you are a bright yellow and prone to being used as a torch in dark areas. The boss can give a work site a once over and be able to tell if you have decided to have an extended lunch, whereas before with everyone in dark clothes it was harder to distinguish one from the other, now you are beautifully highlighted.
Really of course it is so that on a busy worksite, where there is a lot of traffic going back and forth, drivers are able to see where all the workers are and can avoid flattening a concreter by mistake. If you are working in an area that involves heights, then you are going to need harnesses and gloves while for your work shirts in Sydney, this is so that if you do take a dive at least there will be a stop and a swing at the end of the fall, not a stop and a splat. Much nicer to be hanging around and taking in the view from the end of your harness than to be watching the ground fast approaching and knowing there is not going to be a happy ending.