what hypothesis can i give for:

-health care in the usa
-pressure groups in the uk
-the elderly in the uk

2 answers

What point do you want to argue; a hypothesis can be most anything you want. E.G., possibly hypothesis for health care (HC) are:
HC in the USA stinks.
HC in the USA is great.
HC in the USA is too complicated.
HC in the USA is too inefficient.
HC in the USA is amazingly efficient.

Expand your mind
my hypothesis for the usa helath care was

all american citizens pay for their health care