(Reuters) – British finance minister Rishi Sunak is facing criticism over his Indian wife Akshata Murthy’s “non-domiciled” tax status which means she does not pay tax in Britain on her earnings abroad. “Non-dom” status is controversial in Britain as it is an option for very few taxpayers and is overwhelmingly used by the top 1% of earners, for whom it can facilitate tax avoidance. The system, which is distinct from being resident, is unusual among other leading Western countries. Who can be non-domiciled? Being non-domiciled is a tax status that can be used by someone who lives in Britain but …