Because it offers some freedom of choice to people. As such, it will be better accepted by the public at large, and give Insurance companies some role in future healthcare (blunting what will be their absolute opposition to such a bill).Lemme ask... what the heck does “don’t think it suits our country” means? Seems to suit a large fraction of our population already.
A bill must be passed before it can be implemented. It'll still be a tough slog, even with options, enough Americans are filled with fears of 'rationing' and such. I couldn't, with a brief search, find comparisons on the cost of Medicare vs the cost of the German system. As a whole, Americans spend about 50% more on medical care vs Germany, as a percentage of GDP.