I'll preface my remarks by saying I'm not against cash bail full stop. As I'm sure you'll agree, electronic surveillance is a useful tool, not a panacea. In the case of this Wisconsin criminal, the state could have compelled him to finance ankle monitoring, which may have prevented all of this carnage. Remanding him to custody would have almost certainly prevented the atrocities.
Saying criminals are "increasingly finding ways" to circumvent the tech means little to me without the estimated base rate. I'm sure there are plenty of Youtube videos about how to hack the monitor -- as there is no shortage of videos about how to break out of handcuffs and zip-ties. In terms of relative effectiveness over time, it's a constant arms race to build a better mousetrap.
Maybe there's a language divide on "curfew," but I wouldn't want most people to be in quarantine for 24 hours. The majority on monitoring should spend most of their day at work (persistent, jobless criminal underclass addressed later).
Re: Intimidation and consorting with criminals
I do not see how this is different than cash bail. Intimidation is even carried out from behind bars. Electronic monitoring only needs to be better in some respects than the current regime.
And the important difference between bail and tags is that for many people, they're prepared to take certain risks on a tag that they're not prepared to take while on cash bail. There's an obvious reason for this: the consequence for getting caught breaking conditions when on a tag is a return to custody (plus potential additional charges); the consequence for getting caught breaking conditions when on cash bail is a return to custody (plus potential additional charges) plus a significant (to the person) financial penalty.
On top of that additional level of "self-policing" provided by cash bail, there's a further benefit of cash bail: if the person has had to get a friend or family member to post bail, then 1) that friend or family member is likely to put emotional pressure on the person not to breach bail conditions, and 2) if the person does breach bail conditions, the friend or family member is likely to at the very least put pressure on the person to hand themselves in (and occasionally will actually assist law enforcement in locating and capturing the person).
You make good points. I'm not keen on seeing taxpayers fund all of this electronic surveillance. People should pay for their own monitor, including some who are indigent. I don't want to live in a society where GoFundMe raises money for surgery, but I don't mind using it to pay for tracking. In the case of a persistent criminal underclass, those who have no jobs to work during the day, no assets for collateral, and no family, friends, ministries, or bail bond companies willing to pony up the cash -- in other words, nothing left to lose -- then, well, they probably belong in custody.
A case from California that made national news involved a homeless man's crime spree. Dude was found in a stolen car with a meth pipe. Hours after release he stole a tip jar. After he was caught and arrested for that crime, he stole a flatbed truck parked in front of the police station! Now that's just ridiculous, and, granted, the situation is exacerbated by COVID protocols, but if you've been released back into the community, and continue to crime, then, I'm sorry, as much as I hate to say it, there's been a failure to communicate.