The presence of owing money is referred to as being 'in debt'. A person who is in debt is a debtor.
There is no name for people with money however people with no money would be considered poor.
Politicians! :-)
A person who is owed money is called a creditor.
debtors
debt
Creditors are people or organizations (companies, councils, tax man etc) to whom you owe money. Bills, people you owe money to
Debtors.
Debt.
Garnishment .
intrest fee
no that's called stealing
People that owe you money are accounts receivable.
Chasing people who owe you money.