"Taxation is the price of civilisation." So said a much wiser man than me. There is not a civilised society on earth which does not employ taxation, and most often progressive taxation.
Taxation provides the infrastructure necessary to the operation of a developed society, and progressive taxation provides the quantum of funds needed, while imposing the least effective cost upon individual members of society.
A man who earns $20,000 a year pays little or no tax under most progressive systems, and a man who earns $10 million may pay anything up to 60% of his income. This sounds ostensibly unfair, but if one examines the effect upon the two individuals, one finds that the first man takes home $20,000, while the second man takes home $4 million. The respective standards of living enabled by these two disparate situations negates any concerns over the 'unfair' treatment of the multi-millionaire. He has contributed much more to the national coffers, but he has not suffered in any way as a result. He may still have his yacht, or his Ferrari, or his Learjet, while the man who takes home $20,000 would be hard pressed to provide food, clothing, and shelter for himself, let alone his family.