This is just right wing ranting
Working in IT I know all about redundancy - having faced it on both sides of the pond. This is a volatile industry and people get laid off and companies collapse (I've experienced both).
What you get is pretty pitiful. Winging about the 'cost to business' is fine, but the reality is that what you get is a very small offset compared with the reality of losing your income, and trivial benefits (if you're single). Last time it happened, after I paid my mortgage I had £10/month to pay my bills and feed myself. It's tough and it's usually not your fault. In the land of the free, thats the cost. I had a one day notice contract. My employer did give me some redundancy (but only because they needed me to do an orderly shutdown of the operations they were closing). I'm sure business friendly policies like that are what the country needs more of.
The argument about basic rate tax is fine to a degree, although it's laughable to suggest the IFS is unbiased-
50% tax is not that high (it's less than I paid in California).
The problem with raising the personal limit is the kneejerk rightwing reaction to the counterpoint which would need to happen (i.e. raise income tax for those that pay). Otherwise you are giving more to those that don't need it (e.g. on £100K) while reducing your overall income. It's sensible and simpler - it might even be approved of by some on the intelligent right, but don't expect the Sun to announce anything less than Lenin's mausoleum is to be moved to Parliament square.
The truth is we can't have European levels of welfare on US taxes. Darling/Brown and Osborne/Cameron are both as bad as each other in trying to kid us on that front. The deficit is mostly down to not facing that reality, although at the moment cutting much government spending will mostly move people from low paid clerical work onto the dole where many will end up costing almost as much while not giving us any benefit in return.