That's a weird logic in that context - why would politicians link/limit max office age and then look for a way around it?
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They could either just abolish it or if there was political will people-power keep it bcs they've just installed it.
You would have too make to many hypothetical 'if's to get to that scenario making it impractical to debate seriously.
(Also raising retirement age from 62 to eg 65 doesn't help them all that much, raising it from 62 to 85 is just lol - especially when they can simply vote in expedition for them.)