Petition pension age dependent on health and contributions

I do not believe the retirement age should be a blanket 66 years of age. There should be health issues and also how long you have worked for taken into consideration. Someone who has a longstanding illness, which will get worse over time, will not have the ability to enjoy the retirement they have paid into for 50 years. Once you have paid into the system for 40 years you should be able to retire as many people now will not even work for 25 years. Let people who have paid into the system retire and this will free up jobs for younger people. Surely paying £500 pension is considerably less than keeping someone on income support!