Are you talking about politicians, or actual employees?

If the latter: Yes, that is actually stupid, but the stupidity lies not in the term limits for politicians, but in the idea that public servants are employed on the grounds of party affiliation.[1]

But replacing large swathes of competent higher officials every time you change government... The only country I know of for sure that does that is the USA. Are you saying that's the way it works in Brazil, too?

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[1]: Sure, to some extent it exists everywhere, but that's usually only a few sincure posts for old politicians removed from any actual influence by being "promoted diagonally left-upwards". (See, for example, the post of "landshövding" in Sweden.)