If it were as simple as taxes, that would be an easy story to tell, but as you should know, the 'effective tax rate" on Americans in the homeland is pretty darn low if you do the math against a real GROSS income, forgetting about all those exclusions for AGI, or credits, exemptions, deductions etc to reach a taxable income. But few Americans calculate how low they pay, as compared to other countries in the world.
No, this story told here is about Tax Complexity, FBAR penalties, and the IRS offshore jihad against Americans Abroad that is turning them into pariahs. Frankly, with the HUGE DATA gathering scheme on all U.S. Persons living around the world with FATCA, a target is on your back. Best to lose that blue passport or greencard.