No different to wealthy retirees taking the winter fuel allowance. the repair scheme isn't means tested.
IMHO, there is a teeny weeny difference:
You don't have to apply for the Winter Fuel Allowance, everyone in receipt of State Pension gets the £100 (£200 per household), Similar to the ludicrous Christmas Bonus (£10).
Thus, the Winter Fuel Allowance (and Christmas Bonus) is effectively part of the Basic State Pension, it just dressed up to appear the Government are giving something extra.
The repair vouchers have to be applied for, and, there is a limited number.