Abolishing Income Tax, Corporation Tax, Capital Gains Tax and Inheritance Tax

Wouldn't that be a good idea? And it could have been done as well, as Dr. Eamonn Butler (disclosure, one of my bosses) reveals:

If the government sector had grown only in line with inflation, rather than far above it, taxpayers would be £200 billion better off – enough to abolish income tax, corporation tax, capital gains tax and inheritance tax. Just think what that would do for our international competitiveness.

Well, quite.