[greenish_shore1]

You can use an 1:1 isolation transformer to make it safer (if I would ever travel to Brazil, I would definitely have one in by suitcase). They aren't very cheap (otherwise, they would be used in setups like that...) because the metal load it takes to make one.

However, with modern electronics one can be manufactured much cheaper, exercising the same phenomenon which switching-mode PSUs use - increase the AC frequency with a MOSFET, so the transformer can be smaller = more efficient.

[greenish_shore1]

Just to add more details. A 1:1 transformer provides so-called galvanic isolation. You can google it. It's a basic feature of basically all modern mains-powered devices, with a little exception of EMI filters in switching-mode PSUs. It turns (either the low-voltage part of, or all of it) the circuit into an IT-type circuit (isolated), which means that enabling the power to merely flow to the ground doesn't enable it to shock you.