Instead, we would like to encourage businesses to seek hedging of currency risks through their banks and their specialized hedging instruments. These instruments allow fixing future payments in any given currency as of today.
The arbitrageurs help establish the law of one price across market segments so that similar products with similar risk profiles cost the same in various markets at any given point of time. The speculators, a word with much negative connotations, essentially do intertemporal arbitraging and serve a very useful economic function of price discovery, particularly in the financial markets.