Would Universal Healthcare lower the wages of nurses, doctors...?

[maveric]

I work in a hospital and one of my nursing colleagues and I were discussing UH. She is a repug and stated that if UH were to exist in this country, it would drive down the wages and benefits of nurses because there would be no practical way to pay for it. I told her that Canada has UH and I dint see Canadians crossing the border to work in healthcare in the US. She then told me that when she was a nurse in Seattle she worked with flocks of Canadians that work here due to low nursing wages in Canada.
So my questions are as follows:

1.Would nursing wages and benefits go down?
2.How would we pay for UH?
3.Are nurses wages so low in Canada that they are crossing the
border to work in the US to make ends meet?

Can anyone help me with some points for argument.