Should Cruise Control Become Compulsory On All New Cars?

I've held a full UK drivers licence for over 16 years, recently I've started to learn how to ride a motorcycle. Whilst riding a bike, it has become apparent to me that British motorists don't know how to maintain a constant speed, and randomly accelerate or brake for no apparent reason, which causes a ripple through following traffic. Unnecessary braking & acceleration also increaces fuel consumption compared to a driver who maintains a constant speed, so there is a financial incentive to have cruise control aswell. I think it would be a good idea to have cruise control on all cars, then the driver can set a speed and stick to it unless a genuine reason to change speed arises.