It shouldn't be predicated on what you earn, is should be dictated by your debt to income ratio.
Tammy Baldwin came to town yesterday, and told me she has hope for single payer. Stoughton, Wisconsin, is a very conservative city, but I was very pleased to see an equal mix of wingers and singers (Mine. You can use it.) at the Fire Department. Not one to usually speak at these things, I did this time to voice my support for single payer or public option.