While we respect and appreciate your hardwork for XYZ Corp, we believe you are have a fundamental misconception, when it comes to your pay and benefits. Just because we pay you or contribute to your health insurance premiums - that doesn't actually make those things "yours". They are still ours and are subject to all of our deeply held convictions as a corporation in the United States. We have heard that you have been spending part of our money at ABC Corp., we can't tell you how troubling this is to us. The collective psyche of XYZ Corp - even the company's very soul is at stake! We have to inform you - that any and all expenditures at ABC Corp are strictly forbidden.
This is against our deeply held beliefs that not only is our money, our money - but so is any money that we spend on anything. Ever.
Thank you for your understanding. If your spending habits continue we will have to rescind that particular benefit.