State Pension age increase for those who are still in work

The increase in the states pensionable age has added one to three years and maybe more to a persons working life! When I started working only twenty two years ago sixty five was the age of retirerment yet twenty years into my working life like for many others the goal posts have been moved, all I am concerned with is will it be raised again? and what safe guards have we got to prevent this from happening? I feel this is unfair and unjust and not all of us want to keep working, you cant change an important milestone like that.