Gahhhrrrlic:
That's fine if the PS are isolated but the vast majority of the ones I've seen are not.
AFAIK all mains powered supplies are isolated from the mains.
You just need to use two separate supplies.
Gahhhrrrlic:
After all, the op-amp IS designed to pass 10A at full supply rail voltage.
Wishful thinking.
Did you study the SOA graph in the datasheet.
Leo..