Not following Inductive effect

Because of inductive effect order of basicity should be
tertiary amines>secondary amines>primary amines

because the ions formed after accepting photon are stabilized by electron releasing group alkyl
stability of ions should be
R₃N⁺H > R₂N⁺H₂ > RN⁺H₃
This is true in case they are gases

But in aqueous solution this is not true

This is because the ammonium cations formed are stabilized not only by Inductive effect but also by the solvation with water molecules
The larger the cation lesser is the solvation

So both solvation and inductive effect should be considered in deciding the basicity of amines