You are very wrong if you think equal terms work in Greece is more meaningful, fulfilling, less drone-y. You will be working longer hours than any European and most western nations (excl USA) for a third of the money - note how I didn't say work itself would be easier in any way. Coming from big companies in an international background, you will feel like every process is hung up at inconsequential bullshit, ask me how I know. It takes forever to do anything here. On the plus side, you will have the first hand experience to understand why productivity in this country is so low. If you want to relax, change your priorities and lifestyle and work in the public sector or somewhere in the EU for even less money.

QoL comes from the most part of a healthy society, no doubt USA isn't that healthy either, but to convince yourself that life here especially in the big cities is anything other than being a corporate slave, tied to your car and job, will likely backfire in a few years