The [sic] is just wrong. Ultimately, whoever wrote this seems to just not know what he's talking about. "We got" is incorrect, so [sic] after both instances of that would make sense. Others have pointed out that 93 is the incorrect age, so [sic] after 93 would make sense, too. "Are of 60 years old" is incorrect, so [sic] after "of" would make sense.
In short, whoever wrote it seems to be a non-native English speaker. The quotation is full of errors, but "who's" is definitely not one of them.
Phrased in "proper" English, this tweet might read as follows:
"We have a PM who’s 93 years old. We have a team of eminent persons to repair the economy who are all over 60. I guess that 'I’m too old for this s***' is no longer valid."
Edit: Others have pointed out in the comments:
- "We got" is proper English if this is interpreted to be in simple past tense. This is true. I will leave my previous answer alone, but agree that you could retain "We got" and it would be proper past tense. If the tweet weren't full of other odd errors, I would be more likely to interpret it as proper past tense, I think.
- Even in present tense, "we got" is idiomatic. However, professional newspaper editors often use [sic] with nonstandard grammar, as well, even when it is idiomatic.
I think that it may be that PM is still 92 years old. He was born in July 1925 https://en.m.wikipedia.org/wiki/Mahathir_bin_Mohamad
– RubioRic – 2018-05-27T04:01:58.407[sic] only refers to erroneousness in a sentence, not necessarily a grammatical error. – JacobIRR – 2018-05-27T05:02:05.017
1Do you have a link to the original tweet that shows the line: “We got a PM who’s [sic] 93 years old. We got a Team of Eminent Persons I searched online and didn't find anything. Maybe the tweet was translated into English by the journalist? – Mari-Lou A – 2018-05-27T09:24:34.647
1Seems the tweet has been deleted, pity. So it's not 100% certain who wrote [sic], the original twitter user or the journalist/editor himself. – Mari-Lou A – 2018-05-27T09:32:20.227
5It looks to me like the work of a misinformed pedant who thought that who's ought to be whose and wanted to tell everybody that they were cleverer than the original writer. – Colin Fine – 2018-05-27T09:44:56.057
Obviously, [sic] is referring to "we got". – Hot Licks – 2018-05-27T22:22:17.280