You can if your employer's paying for your all-expenses-paid credit card and its attached to a rewards program.

In the case of Kate Carson, she now has enough Amex points to purchase a round-the-world ticket. Instead she treats herself to facials at more than $200 a pop.

"There's almost nothing I can't buy with points," says Carson. "It's great."

Many employers are now paying for their staff to enjoy the bonuses of a rewards credit card citing its use as an added benefit. Those employees who have jobs that take them away from home for long periods of time and use credit cards for their expenses can tap into the huge world of reward spending.

I know I never have a problem spending other people's money...