The policy of localization is racist, but the locals want locals doing all the jobs. China First policy.
Problem is it takes time for someone (anyone) to go from qualified to proficient. The locals have not spent enough time on the job to be as good as the experienced round eyes. This is compounded by the rapid promotion of the locals into the better paid, lower risk and more respected management positions.
CFP Fuel isn't enough for HKG arrival even on a good wx day. The volume of traffic and the inexperience of the HKG local controllers means delays. Add bad wx and it all turns to ****. We don't pay for fuel (and we sure don't get a decent profit share) so why not put on the fuel to make delays a non-issue?