Answer:
The words "their Government", "they", "Themselves" are all references to the Britishers.
Step-by-step explanation:
In the book Indian Home Rule or Hind Swaraj, Mahatma Gandhi wrote how the British rule in his country India has diminished all forms of living conditions for his people. He is of the opinion that this foreign power under which the country is, is wreaking havoc and bringing about a detrimental effect on the whole nation.
When he stated that "India has become impoverished by their Government", he is implying that the Britishers had impoverished the Indian people. The pronouns "they", "themselves" etc are all directed at the Britishers and their power, the people Gandhi blamed for the deplorable condition of his nation.