Not sure bankers in themselves are any greater liars than anyone else in society.
The problems associated with the banks is that governments & central banks around the world created this huge moral hazard over the past decade that lead to the banks creating risks that eventually occured.
The artificially low interest rates supported by crooked official inflation rates (being way lower than real inflation) created an environment in which bankers could take on too much risk.
The Fannie & Freddie May organisations only compounded the problem in which the US government provided bankers with the insurance that should their loans go bad the government would bail them out.
Had the governments and central banks not interfered, the property booms would have corrected a long time before. The free market works best without interference from the government trying to manipulate lending practicies (i.e. by making credit way too cheap). Had governments not provided the moral hazard and artifically cheap credit, bankers would have been a lot more careful on who they lent money to, ensuring higher deposits and thus ensuring the crazy property increases to not occur.
What we need is a return to traditional banking, in which bankers ensure adequate capital is present to support conserative lending practices.
Governments should not promise to support bad banks. This would lead to individuals and businesses only placing their capital in well capitalised banks, thus ensuring that the directors are acting in a manner that preserves depositors. This is the only way in which those running the banks will ensure that they are responsible for the organisation.
The governments cannot try to manipulate the markets. This only leads to more uncertainty/risk and does not lead to the stability that they try and portray.
Unfortunately the manner in which governments and central banks have acted post the crash is likely to lead to more problems with the banks. Government ownership will likely lead to decades of problems, as seen with Japan's zombie organisations this past 25 years.