Why do you assume a government transplant would work? Once you have a dysfunctional pattern in government, politicians and civil servants may very well know how to fix it in theory but be incapable to do so in practice.
Take Greece. Surely someone must have realized that low rates of tax collection combined with high government spendings on pensions and social welfare programs was a slow-moving train wreck. But fixing either the tax collection or cutting spending would immediately run against the vested interests of both constituencies. And in that case, the government directly controlled both levers.
Sure, 25% higher minimum wage than average rent sounds like a mess. The government can decree a higher minimum wage, but a) Brazil most likely has a high proportion of informal/grey market wage earners and b) it would likely be inflationary. Loss of jobs may not be so bad, as recent economic studies have tended to show that you can increase minimum wages within reason and not lose, possibly even increase, jobs.
The Brazilian government doesn't control rent directly in most cases, so the other policy adjustment is missing. There are probably things that could, over time, improve the economic outcomes for both the state and the poor, but they are not easy and would not be popular. Instead, the "solution" was to elect the populist Bolsonaro.
Point is, a country gets itself into a mess little by little, by shortsighted decisions, often meant to buy votes and/or benefit the rich, or at least the middle class, at the expense of the poor. Once different constituencies benefit from the status quo, it is very difficult to take away their advantages. Importing a foreign government would, in my opinion, make it even less likely that meaningful reform could be carried out. Witness the usual outcry whenever the IMF gets involved in reforms of a country's economy. In fact, note that the top-rated answer here calls it colonization despite the fact that colonization was much more about plundering the resources of weaker states rather than improving their government. Finally, you can expect to add another constituency to resist this idea: the displaced politicians.