Yeah so the one working more just gets screwed over with unpaid overtime. If a European employer tried to make their employees work an extra 8 hours a week for free then they'd get sued so fast!
Why not just have a 5BRL per hour minimum wage? Seems like it would be more fair for everybody.
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