Thats in an ideal world, but its not practical for the US in particular because their system only allows for 2 parties.
In fact, many systems boil down to that due to first past the post forcing people to vote strategically instead of for the party that best represents them.
In reality, people have to vote strategically and then use internal party politics such as primaries to shift the party to a more progressive place.
Threatening to make them lose only means the worse party comes into power and rachets everything backwards far more than leaving them in place.
They are vessels that must be driven toward change under the threat of force, sure
Thats in an ideal world, but its not practical for the US in particular because their system only allows for 2 parties.
In fact, many systems boil down to that due to first past the post forcing people to vote strategically instead of for the party that best represents them.
In reality, people have to vote strategically and then use internal party politics such as primaries to shift the party to a more progressive place.
Threatening to make them lose only means the worse party comes into power and rachets everything backwards far more than leaving them in place.