What you are missing here is that the Euro only works if the stronger countries support the weaker ones financially. Without this, the Euro could not be a stable currency.

If a country like Greece or Ireland is basically collapsing, it survives because countries like Germany and France pay for it. There is no such thing as a free lunch. What Germany gains now because of the weak Euro, it had to pay a few months ago to help Greece.

However, Greece has been paid by the government, not small businesses. Small businesses only have to bear that burden gradually by paying taxes.