Without argument, the most successful developed country in the world is the United States, with an annual GDP exceeding $20 trillion.
Interesting thing about our taxes: there is a "sweet spot" in the tax rate of about 24.5%, below which and above which the actual revenues to the government actually goes down. Too little taxation, and revenues decline. Too much taxation, and revenues also decline, as the increased tax rate disincentivized production.
Under the current administration, the tax rate was recently returned to this optimal value after a number of years at a significantly higher rate, resulting in record revenues in FY 2018 (ending October 2018).
It depends on the cycle the country is in. If the country's immediate safety is being threatened by an invading army tax rates really don't matter. After a country can defend itself then the discretionary tax base begins. Death is not imminent when a bureaucrat in a capital city is not there to represent you versus an invading army a few miles down the road marching through your town. Countries that can operate generally at the lowest levels possible as far as overhead expense tend to do better. The more degrees of separation you have with your money there tends to be a much higher expense in the carrying out of those activities.
Obviously high, because success and development is not built on savings or lack of resources, and these can only be generated by creating taxes that will cover the expenses that are mandatory for things to function moderately. But if there is corruption, this is useless.
This is a system among others, because we could build a successful development in another way, a more just, logical and rational, where the traps are not allowed ...