Substitute one word for the italicised expression.

The Bishop criticised the Government for its having no sympathy and an uncaring attitude to the homeless and the unemployed.

callous

The word that can substitute the italicized expression is callous.

• Merciful means showing or feeling mercy.
• Callous means having or showing no pity or compassion.
• Tender means showing or feeling gentle affection or care.
• Compassionate means having or showing sympathy for the suffering or misfortune of others.

Callous is the most appropriate word for the given expression because it specifically refers to a lack of pity or compassion. It is derived from the Latin word callus, meaning "hard skin."