You'd be better off seeing which MPs claim this, and what for, and criticising those who abuse it. They've not given this allowance to themselves, they've been told they can apply for a maximum extra amount.
I've approved a staff member to charge a mobile data package to the office, as they don't have broadband. Several have bought keyboards which I've reimbursed. Everyone already has a work-issued laptop, and we don't allow anything to be printed at home. So yes, many people will have incurred extra expenses, others won't. Why this incessant insistence on a race to the bottom?