A Series S costs around 2.799 BRL.

Comparing GPU prices to minimum wages is a bizarre way to show what you're trying to show. (For a start, median income (according to IMF) in Brazil is around 2,500 BRL/month).

Think of the problem like this: BRs overall price level is 2.256 (IMF) times cheaper than the united states for an equivalent bundle of goods. So if we were to construct an index of what GPU prices would feel like in the United States, you can't take the exchange rate of $1:5.5R$ as given; you'd have to divide through by 2.256.

1,101.06 R$ * 2.25~ / 5.5 $/R$ = $452 USD. You should think of this as the value of the goods at US prices that a Brazilian has to give up to buy a 750ti. A 3070 is $4330 USD when thought of in this way. Factor in scalper prices, which see 3070's selling at an average of $920.

So now you can say properly that the same gamer (same income, preferences, utility function for other goods) would face over 4x higher prices if she/he were in Brazil.

That sucks!

Technically speaking, if two workers get the same wage to work different hours the only who works the less have a higher hourly wage. It's just a... different reasoning I guess 

What you are talking about is called partial time job and can't exceed 30 working hours a week. This system doesn't allow overtime if you work more than 26 hours a week and is overall uncommon (not all unions allow this hiring system)

The legal minimum wage is thus defined for a working month of 220 hours and 30 days. Hence with a 1100 BRL minimum wage you get effectively 5 BRL each hour

In  partial job system someone working only 20 hours a week you get a wage proportional to your working hours, using a 30 days month X 4 hours a day X  5 BRL per hour so you get a 600 BRL wage

Your reasoning is pointless. Neither are really getting any benefit from the system, and a 20 weekly hours job paying a MINIMUM WAGE isn't enough to make a living by any means and it's not an option for a common worker someone must be desperate to accept such therms despite getting a higher paid working hour. Besides, when a company needs someone working only 20 hours a week they are very likely to just sign in a temporary contract, common in retail stores during christmas season 

The ones who got permanent 20-30 weekly hours jobs are a minority in specific jobs that pay more, like for instance fireman. My uncle is a fireman and the nature of his job make him work for 26 hours a week if I'm not mistaken. Those jobs that pays above minimum wage don't really need to pay a higher working hour for a part-time worker than they do with a full-time worker 

48 weekly hours are illegal, the limit are 44. People who works 48 hours every week can sue their employers, they won't because it's just the status quo and they are likely no getting a easy time finding another job 

And I'm a software developer. I'm used to 48 weekly working hours or even 60 weekly hours in crunching period and yes it's illegal to make more than 10 hours a week or more than 36 hours a month, but you know shit happens, the companies that don't crunch their employees often are smaller and with less long-range opportunities. My current one at least pays for the overtime, unlike my last one 

Is it really that hard to make a living of a part-time job? Seeing how the situation is in Brazil, I guess that's true there, but one of the years I was living in the capital city of my country I only spent around 400-500€ a month, rent and all living expenses included. And that was the capital city, where prices are inflated a lot. Granted, I didn't have the fanciest apartment, but if I lived in a less centric place, I could definitely do it for less money and in a much better apartment, and I'd still have enough money to save every month. I'd be personally more than happy in that scenario, and all I'd need to get there would be a part-time job.