建議加多二倍薪俸税, cover 返公務員開支

公務員薪酬開支
https://www.csb.gov.hk/tc_chi/publications_stat/stat/annually/1333.html
薪俸税收入
https://www.fstb.gov.hk/tc/treasury/general/five-major-revenue-sources-of-the-government.htm
公務員退休金支出
https://www.hk01.com/%E7%A0%94%E6%95%B8%E6%89%80/647288/%E5%85%AC%E5%8B%99%E5%93%A1%E6%AF%8F%E5%B9%B4%E7%AB%9F%E6%9C%89%E5%92%81%E5%A4%9A%E4%BA%BA%E9%80%80%E4%BC%91-%E9%80%80%E4%BC%91%E9%87%91%E9%96%8B%E6%94%AF%E5%B9%B4%E8%B6%85400%E5%84%84-8%E5%B9%B4%E5%A4%A7%E5%A2%9E%E8%BF%91%E4%B8%80%E5%80%8D