It’s not what you think.
Members of Congress are covered by the Federal Employees Health Benefits (FEHB) just like all civil service employees. They DO NOT have unlimited sick leave but they do have a very generous policy.
CS employees (including Congress Members) receive 1/2 day for every pay period of paid sick leave. They are paid 26 times a year so they receive 13 days of paid sick leave per year. This sick leave can be used for an illness or to take care of an ill family member.
Sick leave can be accrued. So if you do not take sick leave you can carry your 13 days into the next year. At retirement the remaining unused sick leave can be added to your time of service. It is not unusual for employees to have 6-12 months of unused sick leave at retirement. It’s a good policy to save your sick leave in case of a serious illness.
In case of a severe illness CS employees can use their accrued sick leave followed by an advancement of up to 30 days. After that they can use their vacation days and when that is depleted they can ask for vacation day donations from other employees. CS employees tend to be generous when their coworkers are in need.
So when you hear about members of Congress bitching about giving Rail workers, or anyone for that matter, 7 days of paid sick leave, just remember that they are a bunch of government sucking, whiny little, greedy ass, stingy bitches.