Taxes might increase even more to support an increasing number of elderly people
an increasing number of elderly people
加えて高齢者
additional elderly peopleという直訳でも通じますが、ちょっと不自然に感じますね。
Taxes might increase even more
さらなる増税がされるかも
英語でさらなる税が上がる、という言い方になりますね。
Taxes might increase even more to support an increasing number of elderly people
加えて高齢者を支える為にさらなる増税がされるかも
ご参考になれば幸いです！
Taxes may be raised even more to support the elderly.
"加えて高齢者を支える為にさらなる増税がされるかもしれない"
- Taxes may be raised even more to support the elderly.
消費税増税がうたわれていますが、高齢者を支えるための、社会保障のための増税もあるかもしれない
- Although an increase in consumption tax is being talked about, there is also the chance that taxes for social security in order to support the elderly may increase as well.
アメリカ合衆国 
