Because of the damage to the economy and society that the current welfare system is doing, I think that welfare reform is as urgent as leaving the EU. But there is a deafening silence from the established parties on the issue.
UKIP should be promoting itself as the party that will tackle the issues that the established parties won't, such as welfare dependency (and crime, and transport...).
IMO a simple and radical alternative to the current social security system is this:
http://www.ukipforum.co.uk/about4525.html
Also,
An alternative education system could be this:
http://www.ukipforum.co.uk/post-47435.html
A potential reform to the NHS is this:
http://www.ukipforum.co.uk/post-46899.html