A lot of good stuff there. If this is a 21 year old girl, she's merely echoing a parent or teacher, these aren't new ideas, merely well expressed. How much tax can a 21 year old claim to have paid?
A little heavy on the patriotism at the end. But I'm sure she's working on the next letter, where I'm sure she'll address the lengthy prison terms for those who gained wealth by bankrupting others through the sales of derivatives or by sending U.S. forces into conflicts for corporate profit.