This all cuts both ways - compulsory airbags and seatbelts for bicycles will be the next thing we'll have to endure. And while you're bust dressing pedestrians like cyclists, and car drivers like motorcyclists, lets slip some 'road tax' in the cyclists direction, make everyone truly equal.
but not really.
There is the airbag helmet already (I'm sure we've all seen it demo'd at £400 for a single use) Anything fitted to the bike would be more dangerous or require a radical change in its design and disincentivise more people than the exaggerated fear of death and serious injury. Think what an airbag does in a car- cushions you in or pushes you towards a place of safety and away from the hard jaggedy bits, do you want something fitted into the bike that seeks to actively punch you away from it when activated & the trouble is on a bike, whatever you would get punched towards would be as dangerous if not more so, or are we talking a zorb ball type gizmo to completely encase us - lovely for a theoretical argument and great fun no doubt but in reality?
Seatbelts again are a bit of a different proposition if your inside an object trying not to be thrown out of it or hammering into something hard, as opposed to perched on it having already been hit by something hard & being a lot less safe in the aftermath by having flying or broken bits of metal/carbon strapped on to you causing more flesh wounds and bone breakage as they flail about, Also removing your facility to as readily jump/get free in a minor tumble or if the bike gets trapped or dragged under a bus etc.
Not into scooters so not seen the BMW one with seatbelts, but why on several levels? & are they compulsory for use on UK roads since they're fitted? if so, what liability could BMW have if you were more seriously hurt or killed in a collision such as above where being 12 stone of flesh just falling over and breaking a leg under the fusilage of the scooter 'cos your restricted by the seatbelt from readily moving off it or if your injuries from being in contact with a ton and a half of car or several tons of bus could have been mitigated/survived by not being strapped to it. & If they're not compulsory, they're just as much of a gimmick as fitting an ice cream scoop would be.
As long as its 'road tax' at the same level as other truly zero emission vehicles, why not? wouldn't make a scrap of difference to us and would be a net cost to the system but it'd give the frothy mouthed loons one less strawman to pick at. At least Petronella Wyatt would know her mum was being run over every week by a taxed cyclist
As for the politics aspect, If the politico's thought there was money to be made in taxing us
and a means of selling it as being even slightly fair they'd already be doing it - it would have mass popular support and we'd be seen by the other 98% of the UK & portrayed as such by the politicos as lawless whiners wanting to avoid our civic responsibility if we objected.
But they know that they couldn't do as suggested and recalculate it up under the current emission based process without proving the system is not as advertised and knocking a hole through their supposed green credentials - it'd need a significant and costly overhaul of the entire VEL system to find a means of legitimately charging bikes at net profit in conjunction with other vehicles. Probably for use of the physical space rather than any on any notions of physical or noxious damage caused by bikes to roads & the planet. Even then it'd have to be a peppercorn charge for it to scale up acceptably pro-rata to larger vehicles with a greater physical presence. e.g a family saloon is +/- 12x the on road presence of a bike so assume £20 'bike tax' scales up to £240 tax disc on everything from a 15 year old diesel mondeo with its exhaust scraping on the ground to a mythical water cell powered wonder car that pumps out scented fresh air as exhaust.