It could also be foreign investors stuck in an investment they expected to flip ahead of completion, and not paying their share of the service charge (I was in

It could also be foreign investors stuck in an investment they expected to flip ahead of completion, and not paying their share of the service charge (I was in an old building in central london where that was exactly the case). Also a classic of these luxury buildings is the developer extracting revenues through overcharging for property management. There are now legal ways out but it is a painful process.