Once all the vulnerable in this country are innoculated then we will have the virus more under control
Why would it be under control? And what age are you diverting at?
That means teachers and police don’t get it and we continue to see 48 year olds in ICU. That’s if you cut off at 50. Higher then even more - maybe enough to need high restrictions for a long time
But don't you see, if the virus is left to wreak havoc through poorer, unvaccinated countries there is a good chance it will mutate again (and again, and again). We've seen the distruction the 'UK' variant has caused and how quickly it spread across several countries.
If this were to happen, its not the 48 year olds in ICU (of which there would presumeably be less of given that a large percentage of society would have already been inncoulated), it is the older/clinically vulnerable section of society whose previous vaccination now offers them no protection whatsoever against the new variant who will be taking up ICU bedspace. The whole vaccination programme having to be carried out again when another viable vaccine is found all the while hoping it doesn't mutate again in the meantime.
A 'global' pandemic will only be surpressed if the 'global' population is vaccinated at the same time. So, vaccinating the worlds older and clinically vulnerable at the same time results in a smaller 'healthier' pool of people for the virus to infect wreaking less destruction (as shown by all the statistics) in this group of people whilst they wait to be innoculated in the next group of people 'globally'. Yes, there will undoubtly be casualties amongst this group, there will whatever course of action you take, but it will be far fewer than would occur in the older vulnerable populations still waiting their turn at the back of the queue.
Not so long ago there were outcries about 'killing granny' by acting irresponsibly. Now it seems we don't much care for granny if they happen to live in a different country. They are just seen as collateral damage in the richer nations pursuit of being the first to vaccinate.