Originally Posted by CaptainMark

this from FDX ALPA...

The majority of other member ICAO countries have much more stringent flight physicals than we do, and there is a risk that our FAA may adopt similar measures. There is also concern that if the regulated age is changed to 65, there may be tax issues related to those carriers with defined benefit plans. Additionally, we must also ensure that wording in “age change” legislation clearly spells out that already retired pilots have no right to return to their previous seats with their previous seniority numbers.