investing in bonds issued by banks considered less riskier to corporate bonds

[cripliver]

Simply because Banks who use OPM(Other Peoples Money) more efficiently are supposed to have stringent regulations, hence more prudent risk management practices in place - rather than a corporate whose core business usually is to deal with the REAL ECONOMY, eg, to conceptualize -technically innovate, and engineer a real need in the economy. Hence in real terms the yield of a bond issued by a Bank should be less than that of a AAA Corporate, when the vice versa is true,
Corporate could seek cheaper alternative sources of capital (!