[refurb]

Tax rate and tax evasion aren't really linked.

Do you have any sources that support that assertion? Increasing tax rates increase the incentive to avoid said taxes. If I'm going to go to jail for tax fraud, I'm not going to that if the rate is 2%, but I might if it's 50%.

[Someone]

I don't have sources, but I do think it depends a lot on culture. For example, in Europe (WARNING: sweeping generalizations ahead) the northern countries do not have lower taxation rates than the southern ones, but shadow economies are smaller.

Part of that is that many people in the north consider a welfare state (http://en.m.wikipedia.org/wiki/Welfare_state) worth paying higher taxes for. "I'm a happy taxpayer" is not an unheard of statement, and said without a grain of irony.

Another part is that it is harder to evade taxes in a culture where people are more honest. If the typical accountant complains if you have money you cannot account for, and cannot be bribed, it is more of a hassle to find one that complies with you (conversely, if your accountant suggests ways to evade taxes, more people will be inclined to do it)

Historically, many consider that culture to be the result of Protestantism. Many Protestants consider democratic government to be the will of god (http://en.m.wikipedia.org/wiki/Protestant_culture#Government). That makes any form of revolt against government a sin.