In most democracies if you loose a court case you have to pay all the legal fees, plus damages and reimbursements to the other party. This holds true in criminal or personal cases, and even when the loosing party is the government or the police.
"Reasonable fees". If You sue me, I win and my lawyer sends me a bill for a billion euros that I pass on to you, no judge will consider that valid.
As for damages and reimbursements: hardly. If you arrest a highly paid consultant and keep him in jail during his trial, he's not getting paid his hourly fee * 24 * days in jail.
In practice it doesn't always hold up very well.
Do you have an alternative suggestion? Would the government always pay for the entire defense? Or reimburse if the accused is acquitted?
This is also why gun violence restraining orders are bad. Large costs to the defendent with no standards or hearing or even an accusation of a crime.