I think the tax system as is needs replacing. We pay far more in hidden costs in goods because of the tax system then is probably necessary. When you factor in VAT at each step + the cost companies pass onto the consumer for meeting their tax obligations, it certainly starts to mount up.
Combine this with the cost of the huge government department like the IR and the time spent chasing those who don't want to pay tax and have the means to escape it and I can imagine we must be spending a stupid amount of public money on this.
I'd be in favour of replacing Income tax and replacing it with a Sales tax if a citizens income was introduced, basic need goods where tax free and luxury items where taxed in a higher bracket.
If you therefore buy a porsche you pay say 50% tax as opposed to a loaf of bread which has 0% tax and average item would be at say 20% although this is 3.5% higher then the VAT, by the time you deduct the embdeded costs from the price it wouldn't be any more expensive.
After all I don't believe those who inherit wealth pay income tax on it, because they are not actually earning it. Aren't they liable for capital gains?
IHR can be avoided if you are super wealthy by purchasing a historic property and using the loopholes that allow you to buy somewhere old with historic items that belong to the property, and writing the lot off.
I read an article a while back regarding this, and how the government had totally fallen behind in trying to keep track of those using this loop hole.
Then let local councils levy the taxes to make up the differences rather then central government. I think overall it would be a fairer system especially for societies poorer members would end up better off.