1) Capitalist 2) Exploiter 3) Wartime opportunist 
An organisation or individual who makes excessive profits by charging very high prices for goods which are in short supply.
[n] - someone who makes excessive profit (especially on goods in short supply) 2. [v] - make an unreasonable profit, as on the sale of difficult to obtain goods
noun someone who makes excessive profit (especially on goods in short supply)
a person who seeks or exacts exorbitant profits, esp. through the sale of scarce or rationed goods.