" they do not receive company benefits such as pensions and employment benefits including the right to redundancy payments."
I'm a contractor and it really pisses me off when people trot out this type of statement.
You are an employee of your own company and that company provides your full package, salary, pension, redundancy cover, critical illness, medical, car, etc, etc, etc. That's one of the reason you get paid the day rate you do, because the rate covers more than just an hourly pay rate. If the company director chooses not to provided those benefits then punch them in the mouth.
As the article points out, you'll still be better off than your equivalent typically permie, and even on the lowly £43,000 starting point they quote you're still in the top 20% of earners in the UK.
I don't want to pay more tax. But I recognise how well off I am and I need to contribute to the greater good. Roll on the down votes.