There is not much we or anyone can do.
You cant force people into following moral rules or you cant even force people to anything as “freedom” is one of the ultimate aspiration for a human being. People want to believe they are “free” when in fact noone is.
Most moral values have died out since the death of religions or i wouldnt even consider religious people as morally as they only want to do “good” so they please God and go to heaven.
In todays time people dont know why one should be kind, they know that its good for example to help others in need but they dont fully understand “why” one should be good.
Now a question to you, lets say you can make everyone follow your moral rules in a society and they do it voluntary.
Wouldnt this be the same as everyone being one with another as you would know what their motives were and know exatly what actions they would take? What would happen with yourself and individualism? Wouldnt this look like a dystopia as in theory you would be a slave to rules? Your emotions would be gone as they would by time be meaningless as there would be no conflicts between ones will and another one.
Second question, how would you treat children in your society? Can a child be responsible for their actions when they really cant think rationally?
One lie from a child would ruin your whole society as a lie makes you believe in something false which would alter the reality in what you believe to be true.
And a grown up man in this society should sincerely believe everything to be true as lying is immoral.
And to have doubts of other people lying or not, then this means your society never were morally good.