While I appreciate that social sec is a seperate contribution to the public purse and from Income Tax receipts and is utilised for a specific purpose, to my mind the fact the fact that it is not technically a tax is probably of little interest to the average employee given that it is a deduction at source and an easy parallel with ITIS could be drawn - ie it behaves like a tax.
The very fact the ss pot is supplemented (ultimately from tax receipts) by the states also degrades the distinction a little in my view (I appreciate that most other social tax systems, including UK NICs, operate on a similar principal)
However, if you simply look at the mechanics of ss, it is fair to say the cap does produce a somewhat regressive system. I would have thought there was a reasonable argument that it would be desirable to have a system such that, as a minimum, supports the funding requirement directly through contributions to the ss system itself.
Of course as simple as that sounds it would be a reasonable fundamental reform to the SS system, and these things are never easy in practice, but to my mind it would be an area for reform that would indirectly increase the public spending pot in a fair manner.
If you look at the link below (from gov.je) supplementation is in the region of £50m pa
http://www.gov.je/NR/rdonlyres/9D259D07-DCB8-410F-B822-B9CF3B426D61/0/SOCIALSECURITYREPORTANDACCOUNTS2007.pdfUnsure if this has been considered or there is a fundamental reason why this type of idea isnt implementable... As always 10 lines of waffle on a forum has a habit of simplifying compex issues =)