How do you say §499与党の議員は野党に対する質疑応答のなかで、高齢者の人口は急激に増加しており、高齢者の生活援助がいつでもできるよう消費税の値上げが必要だ、と主張した。 in English?

According to what the member of the ruling party insisted in his answer to the opposition parties, it is of necessity to raise the consumption tax so that they can get ready to support the elderly, whose population is dramatically becoming bigger.