There has been discussion in the news recently about removing the statutory retirement laws.
I haven't had a chance to examine the existing laws closely, but the whole argument is misguided.
Everyone should be free to work, if they can find someone willing to employ them. Every employer should be free to reject any candidate they like, for any reason. They should also be free to terminate employment at any time, for any reason (subject to the terms of the contract).
The state has neither right nor duty to intervene, on either side.