The similarity between slavery and taxes is that taxes are a modern form of slavery.
Also taxes discriminate against the poor, since the rich can afford to use every possible tax shelter.
Have to agree with that. But look at the raising number of people who are fleeing nations which are taxing them to death. But I agree that such an option is available only for the super-rich. For example, a majority of the wealthy French elite migrated to other nations after Hollande raised the income tax to 75%. Again, only the rich could afford.

They can only do that cause Britain & the City of London are a tax heaven, in some way. If the EU, the US, China, Russia, Japan etc. sat together and made sure the rich are taxed everywhere, it would help a lot. Of course they wont do that cause they are all bought by big business and big business likes the current system...
I am self-employed and I am furious that large corporations pay less taxes than my small "mom and pop" buiz. I should setup a LLC in a tax haven too. Costs less than 1000 Euros to do so.