"Any ideas how it can be sorted out? "
Do you mean congenital syphilis OR syphilis as a whole?
If you mean congenital syphilis then this could be eradicated if all pregnant mothers are blood tested and if found positive...treated.
If you mean syphilis as a whole, then this is a social problem mainly and then a medical solution.
Sex is all about opportunity and desire and both of these are readily available in this brave new world.
Teenagers are not scared of becoming pregnant because today it is no big deal to have sex at any opportunity, with multiple partners and they have "understanding parents"......so they are not scared of becoming pregnant unmarried and producing ***.
This is made easier by the contraceptive pill, which encourages sexual activity with the danger of increasing likelihood of syphilitic infection.
Dating sites.....some principle..easy access of multiple partners, although the contagion of syphilis only requires one partner, if infected.
Drug resistance in treating syphilis may well be an added problem.
Promiscuity increase by the above reasons is the main cause, plus.......may i add.......immigration.
The Daily Mail expert is quite correct.