Is Islamic banking as exploitative as conventional banking?

In Pakistan, a number of businesses have emerged, which are collecting investments informally from an increasing number of people, and offering them very lucrative and frequent returns. Although it may sound incredible, it is not impossible to offer such returns. However, there is a definite need to look into the matter with respect to money laundering, even if the investments are genuine, and the returns offered by those groups actually come from the investments they made. One thing that these informal groups claim is perhaps true: putting your money in banks does not generate appropriate returns to investors. If a proper corporate governance and regulatory framework is devised for these informal Shariah-compliant investment and business groups, one may observe a new way of doing business in compliance with Shariah.