What Does My Credit History Have To Do With Me Being Hired For A Job?

I can't think of any instances were your credit history would be looked at as part of a job application form in the UK. Here usually, your credit history is completely separate from anything usually asked on an application form or at an interview. However if you apply for a job in the financial sector eg banking an employer will probably check your financial credit ratings without your knowledge. Obviously banking is one career where sound financial sense is needed.
One problem you  might have with a bad credit history is if you applied for a job were you had to travel or entertain alot and needed a  credit card to do so. You might have to think about how you would do that if the company didn't have company cards  and expected you to pay and claim expenses.
Have you been asked about your credit history at an interview, if so you could, in future ask what the relevence is to your ability to do the job before answering the question.
If you live in the US some application forms do ask you to reveal bad credit ratings - you could check the legalities of that.

Your personal credit history is an extremely valid real life application of your own personal finance management, and because of that, it would be of an immediate reflection to how you could manage someone else's finances.

In most countries you will find that you cannot be a Qualified Accountant if you have ever declared yourself as bankrupt or insolvent; and it is thereby assumed that if you cannot manage your own finances you are not qualified to manage someone else's.

So, to reflect upon why your credit history would have something to do with being hired for a job - Would you employ someone who has been declared bankrupt to control your entity's finances?

I completely agree with this last answer. If someone had declared bankruptcy, it doesn't necessarily mean that you couldn't control your finances. It may be that you are under paid, so you don't make enough to pay basic life expenses. Or maybe you were laid off or fired, and could no longer afford your car payment, mortgage, etc. There are so many unfortunates that could have happened personally, which cause someone to declare bankruptcy. I have witnessed intelligent individuals who were excellent at budgeting and finances declare bankruptcy. So how could you disqualify someone who had something like this happen to them when they are the most qualified for the position? Handling your personal finances and a company's are totally different. The company, I hope, has enough funds to pay all of their accounts timely. If they don't then Accounts Payable would not be able to. Now, you are saying that would be Accounting's fault that the company doesn't have the funds to pay? I don't think so. If there are no funds how can you pay bills? You can't! And people want to measure your credibility that way? Give me a break!