ERISA plan changes

Recently hit with unexpected financial constraints, Acme Company begins to investigate various cost reduction measures. Under one cost reduction strategy, the Acme Company would reduce its long-term labor costs by offering an enhanced retirement package to those employees opting to retire within a given period Another cost reduction plan would require all current retirees to pay their health insurance premiums. The current plan document guarantees that the company will not reduce or eliminate retiree benefits. Elsewhere in the plan document, a less conspicuous statement reserves to the company the right to amend or terminate the plan, but only if deemed necessary. Six days prior to retirement, John, an employee of Acme Company, makes inquires regarding the possibility of obtaining a more lucrative retirement package. Acme Company declines John's solicitation. A month after John retires, Acme Company offers current employees a more lucrative retirement package than provided to John. In addition, the company informs current retirees that, beginning next month, it will require all retirees to pay their entire health insurance premiums. Has Acme Company breached its contractual or fiduciary duty to John?