Re: Wrong question
1) It's not gambling, it's a risk. There's an important difference between the two, and why my earlier Barney Frank quote is so damning. Anybody who doesn't know the difference should never be allowed near the regulatory mechanisms for banking.
2) Because the cost associated with the deposit account probably equal the interest earned on the float, whereas the other is a loan and your failure to pay indicates an increased risk of default. If you are going to actually default, the bank needs to know sooner rather than later. The quicker they can either take you to court to recover their money or write off the loss if that is the case the sooner they can return to profitability.
3) Because the 1950s were a magic time in America. Pretty much everybody else had been bombed to hell and back and we were the only ones with any sort of industrial capacity. That has changed, as it should have.
4) Because the socialists have all decided it's too important to have a banking system that won't fail, so the banks aren't actually a capitalist construct, their a socialist one masquerading as a capitalist one. For the socialists this is a win-win. Their policies always fail so they always get to rail against the capitalists when it is actually their policies which are at fault. You can think of it as a boot stomping on your face - forever.